20811 (number)

20811 is an odd 5-digits composite number following 20810 and preceding 20812. In scientific notation, it is written as 2.0811 × 10^4. The sum of its digits is 12. It has a total of 3 prime factors and 8 positive divisors. There are 11880 positive integers (up to 20811) that are relatively prime to 20811.

Interesting facts

Basic properties

Name

Name twenty thousand eight hundred eleven

Notation

Scientific notation 2.0811 × 10^4
Engineering notation 2.0811 × 10^3

Prime Factorization of 20811

Prime Factorization 3 × 7 × 991

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 20811
Product of the distinct prime numbers

The prime factorization of 20811 is 3 × 7 × 991. Since it has a total of 3 prime factors.

Most popular turbo-numbers

3, 5, 14, 49, 807, 250, 1151, 5885, 12479, 13789, 425345, 374162, 9641735, 7757604, 83372763, 16597166, 815243908, 248255442, 1679459647, 6218725567

Basic calculations (n = 20811)

Multiplication

n×y
n×2 41622
n×3 62433
n×4 83244
n×5 104055

Division

n÷y
n÷2 10405.5
n÷3 6937
n÷3 5202.75
n÷5 4162.2

Exponentiation

ny
n2 433097721
n3 9013196671731
n4 187573635935393841
n5 3.9035949374515E+21

Nth Root

y√n
2√n 144.26018161641
3√n 27.506224486329
4√n 12.010836008222
5√n 7.3056454194753

Divisors of 20811

1, 3, 7, 21, 991, 2973, 6937, 20811

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 -20810
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 20811 can be divided by 8 positive divisors. The sum of these divisors (counting 20811) is 1, the average is 0.125.

Base conversion 20811

Base System Value
2 Binary 101000101001011
3 Ternary 1001112210
4 Quaternary 11011023
5 Quinary 1131221
6 Senary 240203
8 Octal 50513
10 Decimal 20811
12 Duodecimal 10063
16 Hexadecimal 514b
20 Vigesimal 2c0b
36 Base36 g23

Cryptographic Hash Functions

md5 4ac4cbd6ebfd454fd1d1c310cad3c644
sha1 e3814f50894740ec21591ec580a4cda1df6dab3d
sha256 b5d9f5f336cec577f636021c37ec17c5cd7f352fbd94d66e734a994bf57e4ca7
sha512 906c1e18e4664c54e96d2c083df8ca639bbef1e4936ec0e486f2ef8950ae088285e8ded20bbd182b400d61522c74d25715537041fd3d96828c9065f9524bc3e4
ripemd-160 4632908e86affe3cfb6bdf943a95344cd0ced43d

20811 as geometric shapes

Circle

Radius = n
Diameter 41622
Circumference 130759.36942771
Area 1360616618.5801

Sphere

Radius = n
Volume 37754389932360
Surface area 5442466474.3203
Circumference 130759.36942771

Square

Length = n
Perimeter 83244
Area 433097721
Diagonal 29431.198446546

Cube

Length = n
Surface area 2598586326
Volume 9013196671731
Space diagonal 36045.709356316

Equilateral Triangle

Length = n
Perimeter 62433
Area 187536814.35357
Altitude 18022.854678158

Triangular Pyramid

Length = n
Surface area 187536814.35357
Volume 1062215414458.2
Height 9810.3994821822