21127981 (number)

21127981 is an odd 8-digits composite number following 21127980 and preceding 21127982. In scientific notation, it is written as 2.1127981 × 10^7. The sum of its digits is 31. It has a total of 4 prime factors and 16 positive divisors. There are 16893360 positive integers (up to 21127981) that are relatively prime to 21127981.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1127981 × 10^7
Engineering notation 2.1127981 × 10^6

Prime Factorization of 21127981

Prime Factorization 19 × 7 × 67 × 2371

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21127981
Product of the distinct prime numbers

The prime factorization of 21127981 is 19 × 7 × 67 × 2371. Since it has a total of 4 prime factors.

Most popular turbo-numbers

8, 8, 68, 56, 662, 317, 8203, 3865, 20976, 41668, 292986, 40438, 2716845, 9317265, 67070334, 60748018, 938179810, 656564170, 8778628610, 4478057128

Basic calculations (n = 21127981)

Multiplication

n×y
n×2 42255962
n×3 63383943
n×4 84511924
n×5 105639905

Division

n÷y
n÷2 10563990.5
n÷3 7042660.3333333
n÷3 5281995.25
n÷5 4225596.2

Exponentiation

ny
n2 446391581136361
n3 9.431352844809E+21
n4 1.9926544370942E+29
n5 4.2100765086492E+36

Nth Root

y√n
2√n 4596.5183563214
3√n 276.45174305281
4√n 67.797627954977
5√n 29.172362365564

Divisors of 21127981

1, 7, 19, 67, 133, 469, 1273, 2371, 8911, 16597, 45049, 158857, 315343, 1111999, 3018283, 21127981

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 -21127980
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 21127981 can be divided by 16 positive divisors. The sum of these divisors (counting 21127981) is 1, the average is 0.0625.

Base conversion 21127981

Base System Value
2 Binary 1010000100110001100101101
3 Ternary 1110202102010211
4 Quaternary 1100212030231
5 Quinary 20402043411
6 Senary 2032502421
8 Octal 120461455
10 Decimal 21127981
12 Duodecimal 70aaa11
16 Hexadecimal 142632d
20 Vigesimal 6c0jj1
36 Base36 ckugd

Cryptographic Hash Functions

md5 2ebaa1b21a08536a3ffa6323f0d52809
sha1 7b677b6eb302765bf50bad6799fcde96b27ea10d
sha256 0f51f21b598412bee85e00da47e30a42ef66a7a98cb55dfd0ec69eebfdb555a9
sha512 13f7d261f8f3336d885f53e1b5b1cb72c7cbd7182f45022d06fdb11a7ec20a96375167b454d1a67cde663e626e12a63dc82c34ef1017209778d17e97f62e1e92
ripemd-160 4facd9666ac9dd03a1910b841ad32df6a33db886

21127981 as geometric shapes

Circle

Radius = n
Diameter 42255962
Circumference 132751019.78957
Area 1.4023805119223E+15

Sphere

Radius = n
Volume 3.950595841422E+22
Surface area 5.6095220476893E+15
Circumference 132751019.78957

Square

Length = n
Perimeter 84511924
Area 446391581136361
Diagonal 29879477.275761

Cube

Length = n
Surface area 2678349486818166
Volume 9.431352844809E+21
Space diagonal 36594736.55335

Equilateral Triangle

Length = n
Perimeter 63383943
Area 1.932932246498E+14
Altitude 18297368.276675

Triangular Pyramid

Length = n
Surface area 1.932932246498E+14
Volume 1.1114955920546E+21
Height 9959825.758587