20685 (number)

20685 is an odd 5-digits composite number following 20684 and preceding 20686. In scientific notation, it is written as 2.0685 × 10^4. The sum of its digits is 21. It has a total of 3 prime factors and 8 positive divisors. There are 9408 positive integers (up to 20685) that are relatively prime to 20685.

Interesting facts

Basic properties

Name

Name twenty thousand six hundred eighty-five

Notation

Scientific notation 2.0685 × 10^4
Engineering notation 2.0685 × 10^3

Prime Factorization of 20685

Prime Factorization 7 × 15 × 197

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 20685
Product of the distinct prime numbers

The prime factorization of 20685 is 7 × 15 × 197. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 2, 80, 1, 95, 560, 6298, 746, 62019, 87839, 839861, 895817, 678712, 9035831, 90459448, 45420385, 92348298, 523699415, 4940026647, 4627425912

Basic calculations (n = 20685)

Multiplication

n×y
n×2 41370
n×3 62055
n×4 82740
n×5 103425

Division

n÷y
n÷2 10342.5
n÷3 6895
n÷3 5171.25
n÷5 4137

Exponentiation

ny
n2 427869225
n3 8850474919125
n4 183072073702100625
n5 3.786845844528E+21

Nth Root

y√n
2√n 143.82280764886
3√n 27.450600018072
4√n 11.992614712766
5√n 7.2967775251266

Divisors of 20685

1, 7, 15, 105, 197, 1379, 2955, 20685

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20684
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20685 can be divided by 8 positive divisors. The sum of these divisors (counting 20685) is 1, the average is 0.125.

Base conversion 20685

Base System Value
2 Binary 101000011001101
3 Ternary 1001101010
4 Quaternary 11003031
5 Quinary 1130220
6 Senary 235433
8 Octal 50315
10 Decimal 20685
12 Duodecimal bb79
16 Hexadecimal 50cd
20 Vigesimal 2be5
36 Base36 fyl

Cryptographic Hash Functions

md5 9b2a084225d184770748a90c42a7b760
sha1 0b1b7a869c62129aa0d01c9900910a0cd035744a
sha256 6d34ecabd5bac4464b842e13ae57397b4fbbfb0d314b969e3b27071520ca783d
sha512 194c24de57adb08e0305f9713767a33179caa52fe1b8bc252db10ba658d522c7b2d2f079363a23db6aaad9e5eafb1c9ffb9c34fc7e7da78ab8f501da761dbbe7
ripemd-160 813cac8b3b2cc0bb6b3da3fe987dcd2b0f523672

20685 as geometric shapes

Circle

Radius = n
Diameter 41370
Circumference 129967.68807901
Area 1344190813.9572

Sphere

Radius = n
Volume 37072782648938
Surface area 5376763255.8286
Circumference 129967.68807901

Square

Length = n
Perimeter 82740
Area 427869225
Diagonal 29253.007537687

Cube

Length = n
Surface area 2567215350
Volume 8850474919125
Space diagonal 35827.470954562

Equilateral Triangle

Length = n
Perimeter 62055
Area 185272809.17378
Altitude 17913.735477281

Triangular Pyramid

Length = n
Surface area 185272809.17378
Volume 1043038472005.8
Height 9751.0025125625