20451981 (number)

20451981 is an odd 8-digits composite number following 20451980 and preceding 20451982. In scientific notation, it is written as 2.0451981 × 10^7. The sum of its digits is 30. It has a total of 4 prime factors and 16 positive divisors. There are 12358320 positive integers (up to 20451981) that are relatively prime to 20451981.

Interesting facts

Basic properties

Name

Name twenty million four hundred fifty-one thousand nine hundred eighty-one

Notation

Scientific notation 2.0451981 × 10^7
Engineering notation 2.0451981 × 10^6

Prime Factorization of 20451981

Prime Factorization 3 × 11 × 443 × 1399

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20451981
Product of the distinct prime numbers

The prime factorization of 20451981 is 3 × 11 × 443 × 1399. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 6, 92, 35, 752, 660, 2890, 4620, 48385, 63086, 613262, 469642, 7440867, 6752752, 74248957, 55161046, 577185077, 945285130, 4252017569, 8450335026

Basic calculations (n = 20451981)

Multiplication

n×y
n×2 40903962
n×3 61355943
n×4 81807924
n×5 102259905

Division

n÷y
n÷2 10225990.5
n÷3 6817327
n÷3 5112995.25
n÷5 4090396.2

Exponentiation

ny
n2 418283526824361
n3 8.5547267432248E+21
n4 1.7496110881263E+29
n5 3.5783012731748E+36

Nth Root

y√n
2√n 4522.3866486624
3√n 273.47132417061
4√n 67.248692542401
5√n 28.98324954563

Divisors of 20451981

1, 3, 11, 33, 443, 1329, 1399, 4197, 4873, 14619, 15389, 46167, 619757, 1859271, 6817327, 20451981

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 -20451980
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 20451981 can be divided by 16 positive divisors. The sum of these divisors (counting 20451981) is 1, the average is 0.0625.

Base conversion 20451981

Base System Value
2 Binary 1001110000001001010001101
3 Ternary 1102111001211210
4 Quaternary 1032001022031
5 Quinary 20213430411
6 Senary 2010205033
8 Octal 116011215
10 Decimal 20451981
12 Duodecimal 6a23779
16 Hexadecimal 138128d
20 Vigesimal 67g9j1
36 Base36 c6cul

Cryptographic Hash Functions

md5 1cbe553f521e7b4096441a79ef800a42
sha1 1e8e6b7695de0a6970187a3275175eb404386d74
sha256 d2a32d225a1d296d24afa9061842c0f5e730967b2569132e22ff7fda727023ac
sha512 0c83ae2da50fa0439d05e0c9b55d5c538ba04a2fdbac0c7c529f33296fa244afb052fc52b8be6885a88a7fd120fb925266b2d21c93dba61702aae64aefef1af1
ripemd-160 3213d516ed4291ce83776f99a1973949ff0b5b6b

20451981 as geometric shapes

Circle

Radius = n
Diameter 40903962
Circumference 128503586.52192
Area 1.314076454989E+15

Sphere

Radius = n
Volume 3.5833955586644E+22
Surface area 5.2563058199562E+15
Circumference 128503586.52192

Square

Length = n
Perimeter 81807924
Area 418283526824361
Diagonal 28923468.907597

Cube

Length = n
Surface area 2509701160946166
Volume 8.5547267432248E+21
Space diagonal 35423870.207433

Equilateral Triangle

Length = n
Perimeter 61355943
Area 1.8112208010722E+14
Altitude 17711935.103717

Triangular Pyramid

Length = n
Surface area 1.8112208010722E+14
Volume 1.008184215222E+21
Height 9641156.3025323