20645 (number)

20645 is an odd 5-digits composite number following 20644 and preceding 20646. In scientific notation, it is written as 2.0645 × 10^4. The sum of its digits is 17. It has a total of 2 prime factors and 4 positive divisors. There are 16512 positive integers (up to 20645) that are relatively prime to 20645.

Interesting facts

Basic properties

Name

Name twenty thousand six hundred forty-five

Notation

Scientific notation 2.0645 × 10^4
Engineering notation 2.0645 × 10^3

Prime Factorization of 20645

Prime Factorization 5 × 4129

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 20645
Product of the distinct prime numbers

The prime factorization of 20645 is 5 × 4129. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 7, 37, 71, 282, 827, 687, 1119, 14230, 68404, 848419, 873867, 3070493, 2153402, 82108680, 11869625, 185719044, 807304814, 8723242696, 3899985130

Basic calculations (n = 20645)

Multiplication

n×y
n×2 41290
n×3 61935
n×4 82580
n×5 103225

Division

n÷y
n÷2 10322.5
n÷3 6881.6666666667
n÷3 5161.25
n÷5 4129

Exponentiation

ny
n2 426216025
n3 8799229836125
n4 181660099966800625
n5 3.7503727638146E+21

Nth Root

y√n
2√n 143.68368035375
3√n 27.432894232289
4√n 11.986812768779
5√n 7.293953284104

Divisors of 20645

1, 5, 4129, 20645

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20644
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20645 can be divided by 4 positive divisors. The sum of these divisors (counting 20645) is 1, the average is 0.25.

Base conversion 20645

Base System Value
2 Binary 101000010100101
3 Ternary 1001022122
4 Quaternary 11002211
5 Quinary 1130040
6 Senary 235325
8 Octal 50245
10 Decimal 20645
12 Duodecimal bb45
16 Hexadecimal 50a5
20 Vigesimal 2bc5
36 Base36 fxh

Cryptographic Hash Functions

md5 813eb639491e5e5be984f34cc200a848
sha1 4fa68bce2e9071ca05f493718449497cdb53cfb5
sha256 10276607faaa8a3bd584275d86a741867534babadbe6fd9ffb1757104247896c
sha512 754500959b72c5d4fc1dda0c3eb2a8f7f7f779a03094e93ad7901241f71b483ffd3c8c340c7a2b84ffd888c8898fbf4f9b367b88dd4cf2ed247d266a5c28ef4e
ripemd-160 068c9713f950fddbfd4030c0c3a974a3d7a4bc98

20645 as geometric shapes

Circle

Radius = n
Diameter 41290
Circumference 129716.36066672
Area 1338997132.9822

Sphere

Radius = n
Volume 36858127747225
Surface area 5355988531.929
Circumference 129716.36066672

Square

Length = n
Perimeter 82580
Area 426216025
Diagonal 29196.438995193

Cube

Length = n
Surface area 2557296150
Volume 8799229836125
Space diagonal 35758.188922259

Equilateral Triangle

Length = n
Perimeter 61935
Area 184556952.57501
Altitude 17879.09446113

Triangular Pyramid

Length = n
Surface area 184556952.57501
Volume 1036999181057.2
Height 9732.1463317308