20245 (number)
20,245 (twenty thousand two hundred fortyfive) is an odd fivedigits composite number following 20244 and preceding 20246. In scientific notation, it is written as 2.0245 × 10^{4}. The sum of its digits is 13. It has a total of 2 prime factors and 4 positive divisors. There are 16,192 positive integers (up to 20245) that are relatively prime to 20245.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 5
 Sum of Digits 13
 Digital Root 4
Name
Short name  20 thousand 245 

Full name  twenty thousand two hundred fortyfive 
Notation
Scientific notation  2.0245 × 10^{4} 

Engineering notation  20.245 × 10^{3} 
Prime Factorization of 20245
Prime Factorization 5 × 4049
Composite numberω(n)  Distinct Factors  2  Total number of distinct prime factors 

Ω(n)  Total Factors  2  Total number of prime factors 
rad(n)  Radical  20245  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  1  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 20,245 is 5 × 4049. Since it has a total of 2 prime factors, 20,245 is a composite number.
Divisors of 20245
4 divisors
τ(n)  Total Divisors  4  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  24300  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  4055  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  6075  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  142.28492541376  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  3.3325102880658  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 20,245 can be divided by 4 positive divisors (out of which 0 are even, and 4 are odd). The sum of these divisors (counting 20,245) is 24,300, the average is 6,075.
Other Arithmetic Functions (n = 20245)
φ(n)  Euler Totient  16192  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  4048  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 2291  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  16  The number of ways n can be represented as the sum of 2 squares 
There are 16,192 positive integers (less than 20,245) that are coprime with 20,245. And there are approximately 2,291 prime numbers less than or equal to 20,245.
Divisibility of 20245
m  2  3  4  5  6  7  8  9 

n mod m  1  1  1  0  1  1  5  4 
The number 20,245 is divisible by 5.
Classification of 20245
By Arithmetic functions
 Arithmetic
 Semiprime
 Deficient
Expressible via specific sums
 Polite
By Powers
 Square Free
Other numbers
 LucasCarmichael
Base conversion (20245)
Base  System  Value 

2  Binary  100111100010101 
3  Ternary  1000202211 
4  Quaternary  10330111 
5  Quinary  1121440 
6  Senary  233421 
8  Octal  47425 
10  Decimal  20245 
12  Duodecimal  b871 
16  Hexadecimal  4f15 
20  Vigesimal  2ac5 
36  Base36  fmd 
Basic calculations (n = 20245)
Multiplication
n×yn×2  40490 

n×3  60735 
n×4  80980 
n×5  101225 
Division
n÷yn÷2  10122.500 

n÷3  6748.333 
n÷4  5061.250 
n÷5  4049.000 
Exponentiation
n^{y}n^{2}  409860025 

n^{3}  8297616206125 
n^{4}  167985240093000625 
n^{5}  3400861185682797653125 
Nth Root
^{y}√n^{2}√n  142.28492541376 

^{3}√n  27.254565349062 
^{4}√n  11.928324501528 
^{5}√n  7.2654673628271 
20245 as geometric shapes
Circle
Radius = nDiameter  40490 

Circumference  127203.08654385 
Area  1287613243.5401 
Sphere
Radius = nVolume  34756973487293 

Surface area  5150452974.1605 
Circumference  127203.08654385 
Square
Length = nPerimeter  80980 

Area  409860025 
Diagonal  28630.753570243 
Cube
Length = nSurface area  2459160150 

Volume  8297616206125 
Space diagonal  35065.368599232 
Equilateral Triangle
Length = nPerimeter  60735 

Area  177474596.82286 
Altitude  17532.684299616 
Triangular Pyramid
Length = nSurface area  709898387.29145 

Volume  977883447839.06 
Height  16529.973280882 
Cryptographic Hash Functions
md5  a3b50762ba94a13bd2d70d377ce4ada9 

sha1  b486502f6d8a3bcdc5da35f22b1be480d1f8abfd 
sha256  63d00eefcb41c5b33a0a567211315907e7985bbf2b44348cbbce9a5e595e4c6f 
sha512  a9cf249b3419d512a324afd6b10665944b72d294c766bbdf78288bd1d858aa80aa55d78d06d7f8adf79e3204474a402854962bd48c1f5889eee50ca2de2012d8 
ripemd160  4d7c31703fbb3142251f3a5a0e52846293d518fd 