20806821 (number)

20806821 is an odd 8-digits composite number following 20806820 and preceding 20806822. In scientific notation, it is written as 2.0806821 × 10^7. The sum of its digits is 27. It has a total of 4 prime factors and 16 positive divisors. There are 11888856 positive integers (up to 20806821) that are relatively prime to 20806821.

Interesting facts

Basic properties

Name

Name twenty million eight hundred six thousand eight hundred twenty-one

Notation

Scientific notation 2.0806821 × 10^7
Engineering notation 2.0806821 × 10^6

Prime Factorization of 20806821

Prime Factorization 3 × 49 × 9 × 15727

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20806821
Product of the distinct prime numbers

The prime factorization of 20806821 is 3 × 49 × 9 × 15727. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 10, 17, 73, 298, 721, 8342, 5146, 70276, 58076, 934239, 821637, 5340304, 3450899, 1516856, 28207066, 308039538, 309689050, 8093333913, 4768653170

Basic calculations (n = 20806821)

Multiplication

n×y
n×2 41613642
n×3 62420463
n×4 83227284
n×5 104034105

Division

n÷y
n÷2 10403410.5
n÷3 6935607
n÷3 5201705.25
n÷5 4161364.2

Exponentiation

ny
n2 432923800126041
n3 9.0077680158623E+21
n4 1.8742301671557E+29
n5 3.8996771600809E+36

Nth Root

y√n
2√n 4561.4494406932
3√n 275.0438321317
4√n 67.538503393939
5√n 29.08313010863

Divisors of 20806821

1, 3, 9, 27, 49, 147, 441, 1323, 15727, 47181, 141543, 424629, 770623, 2311869, 6935607, 20806821

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20806820
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20806821 can be divided by 16 positive divisors. The sum of these divisors (counting 20806821) is 1, the average is 0.0625.

Base conversion 20806821

Base System Value
2 Binary 1001111010111110010100101
3 Ternary 1110011002121000
4 Quaternary 1033113302211
5 Quinary 20311304241
6 Senary 2021543513
8 Octal 117276245
10 Decimal 20806821
12 Duodecimal 6b74b99
16 Hexadecimal 13d7ca5
20 Vigesimal 6a0h11
36 Base36 cdyn9

Cryptographic Hash Functions

md5 c97349820af4039358499f4e41a53e39
sha1 ab19abaa39f20072860120566c86533c33ac27ef
sha256 bc2b229e5cd53afd24ae1601c9b9825017427b3c923bc2bc859b79afd31a87e6
sha512 0d752deecde1da8216097b6142f03bfd95a33d47f5dd78d6db1f76e31358ee23cfb585fba3f445e325682bd62f914cab769d586a88bf3c6716f3bd7b99af8bcf
ripemd-160 e9559646ee1dfe8cc394e16a1b8f621b5837f06b

20806821 as geometric shapes

Circle

Radius = n
Diameter 41613642
Circumference 130733111.99632
Area 1.3600702300401E+15

Sphere

Radius = n
Volume 3.7731650431832E+22
Surface area 5.4402809201606E+15
Circumference 130733111.99632

Square

Length = n
Perimeter 83227284
Area 432923800126041
Diagonal 29425288.448069

Cube

Length = n
Surface area 2597542800756246
Volume 9.0077680158623E+21
Space diagonal 36038471.115991

Equilateral Triangle

Length = n
Perimeter 62420463
Area 1.8746150440602E+14
Altitude 18019235.557996

Triangular Pyramid

Length = n
Surface area 1.8746150440602E+14
Volume 1.0615756412286E+21
Height 9808429.4826898