20809 (number)

20809 is an odd 5-digits prime number following 20808 and preceding 20810. In scientific notation, it is written as 2.0809 × 10^4. The sum of its digits is 19. It has a total of 1 prime factors and 2 positive divisors. There are 20808 positive integers (up to 20809) that are relatively prime to 20809.

Interesting facts

Basic properties

Name

Name twenty thousand eight hundred nine

Notation

Scientific notation 2.0809 × 10^4
Engineering notation 2.0809 × 10^3

Prime Factorization of 20809

Prime Factorization 20809

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 20809
Product of the distinct prime numbers

The prime factorization of 20809 is 20809. Since it has a total of 1 prime factors.

Most popular turbo-numbers

5, 1, 28, 94, 268, 869, 2890, 4855, 93250, 32731, 15478, 66764, 1989183, 6590955, 82475031, 32035818, 140986251, 463224853, 6987952661, 9109641268

Basic calculations (n = 20809)

Multiplication

n×y
n×2 41618
n×3 62427
n×4 83236
n×5 104045

Division

n÷y
n÷2 10404.5
n÷3 6936.3333333333
n÷3 5202.25
n÷5 4161.8

Exponentiation

ny
n2 433014481
n3 9010598335129
n4 187501540755699361
n5 3.9017195615853E+21

Nth Root

y√n
2√n 144.25324953012
3√n 27.505343314331
4√n 12.010547428412
5√n 7.305504995156

Divisors of 20809

1, 20809

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 20810
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 10405
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 144.25671561491
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9999038923594
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20809 can be divided by 2 positive divisors. The sum of these divisors (counting 20809) is 20810, the average is 10405.

Base conversion 20809

Base System Value
2 Binary 101000101001001
3 Ternary 1001112201
4 Quaternary 11011021
5 Quinary 1131214
6 Senary 240201
8 Octal 50511
10 Decimal 20809
12 Duodecimal 10061
16 Hexadecimal 5149
20 Vigesimal 2c09
36 Base36 g21

Cryptographic Hash Functions

md5 2c8acfd9373aef9b1caa21e451877fe1
sha1 00e5cd06bd0ff625875d73bc59733fc128b9d598
sha256 0fdedb326a749c44b1c79c6d02139d280f81c02bea8f7d9be9b5222b2e556c01
sha512 65aa73d119f7d0fcb25fa917d9962d58a19d24864a5ca76e2847d3dd5a3a38e8b06bd0f276305a29f2666ad649e674598d3f1f835fa3e4e0231180dad1b25951
ripemd-160 832ebc215f7c51c3360bfb8e99dc6d3a823ac4fc

20809 as geometric shapes

Circle

Radius = n
Diameter 41618
Circumference 130746.8030571
Area 1360355112.4076

Sphere

Radius = n
Volume 37743506045453
Surface area 5441420449.6304
Circumference 130746.8030571

Square

Length = n
Perimeter 83236
Area 433014481
Diagonal 29428.370019422

Cube

Length = n
Surface area 2598086886
Volume 9010598335129
Space diagonal 36042.245254701

Equilateral Triangle

Length = n
Perimeter 62427
Area 187500770.37627
Altitude 18021.12262735

Triangular Pyramid

Length = n
Surface area 187500770.37627
Volume 1061909197553
Height 9809.4566731406