21747981 (number)

21747981 is an odd 8-digits composite number following 21747980 and preceding 21747982. In scientific notation, it is written as 2.1747981 × 10^7. The sum of its digits is 39. It has a total of 5 prime factors and 32 positive divisors. There are 12983040 positive integers (up to 21747981) that are relatively prime to 21747981.

Interesting facts

Basic properties

Name

Name twenty-one million seven hundred forty-seven thousand nine hundred eighty-one

Notation

Scientific notation 2.1747981 × 10^7
Engineering notation 2.1747981 × 10^6

Prime Factorization of 21747981

Prime Factorization 3 × 17 × 211 × 47 × 43

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 21747981
Product of the distinct prime numbers

The prime factorization of 21747981 is 3 × 17 × 211 × 47 × 43. Since it has a total of 5 prime factors.

Most popular turbo-numbers

6, 1, 97, 25, 768, 453, 2238, 6221, 35016, 30349, 322922, 328970, 9829545, 8272947, 69629141, 35074172, 489798781, 545449481, 8255474939, 8326541770

Basic calculations (n = 21747981)

Multiplication

n×y
n×2 43495962
n×3 65243943
n×4 86991924
n×5 108739905

Division

n÷y
n÷2 10873990.5
n÷3 7249327
n÷3 5436995.25
n÷5 4349596.2

Exponentiation

ny
n2 472974677576361
n3 1.0286244301412E+22
n4 2.2370504562846E+29
n5 4.8651330819319E+36

Nth Root

y√n
2√n 4663.473062
3√n 279.12987106433
4√n 68.289626313226
5√n 29.341599777948

Divisors of 21747981

1, 3, 17, 43, 47, 51, 129, 141, 211, 633, 731, 799, 2021, 2193, 2397, 3587, 6063, 9073, 9917, 10761, 27219, 29751, 34357, 103071, 154241, 168589, 426431, 462723, 505767, 1279293, 7249327, 21747981

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21747980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21747981 can be divided by 32 positive divisors. The sum of these divisors (counting 21747981) is 1, the average is 0.03125.

Base conversion 21747981

Base System Value
2 Binary 1010010111101100100001101
3 Ternary 1111220220121210
4 Quaternary 1102331210031
5 Quinary 21031413411
6 Senary 2054045033
8 Octal 122754415
10 Decimal 21747981
12 Duodecimal 7349779
16 Hexadecimal 14bd90d
20 Vigesimal 6fi9j1
36 Base36 cy4ul

Cryptographic Hash Functions

md5 b0c387ccb7d804f425e7b2c6a626a2f3
sha1 a1fadd95fe52f7d6171e8401f3a271206eb3f120
sha256 3eef2fed9eebdacb2f12531951a508b88b39f8f29afc91244e27439b7c59da09
sha512 59fd787f2a31e0ef6c9aa7d2a8986e0d9752709a10b4c326cdeba3d054909314cd7b8fc4b1faaff5e6b065161e4b11c27c43143c24b9b4723ce6e77ae1725b09
ripemd-160 5f89188a2007d29bd562bd1419ced6e0c2ac20e8

21747981 as geometric shapes

Circle

Radius = n
Diameter 43495962
Circumference 136646594.68002
Area 1.4858937724079E+15

Sphere

Radius = n
Volume 4.3086919373794E+22
Surface area 5.9435750896316E+15
Circumference 136646594.68002

Square

Length = n
Perimeter 86991924
Area 472974677576361
Diagonal 30756289.684432

Cube

Length = n
Surface area 2837848065458166
Volume 1.0286244301412E+22
Space diagonal 37668608.054043

Equilateral Triangle

Length = n
Perimeter 65243943
Area 2.0480404306394E+14
Altitude 18834304.027021

Triangular Pyramid

Length = n
Surface area 2.0480404306394E+14
Volume 1.2122455164116E+21
Height 10252096.561477