21087979 (number)

21087979 is an odd 8-digits composite number following 21087978 and preceding 21087980. In scientific notation, it is written as 2.1087979 × 10^7. The sum of its digits is 43. It has a total of 2 prime factors and 4 positive divisors. There are 19170880 positive integers (up to 21087979) that are relatively prime to 21087979.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1087979 × 10^7
Engineering notation 2.1087979 × 10^6

Prime Factorization of 21087979

Prime Factorization 11 × 1917089

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21087979
Product of the distinct prime numbers

The prime factorization of 21087979 is 11 × 1917089. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 8, 84, 25, 968, 516, 4429, 9767, 59047, 42312, 976394, 978324, 4935337, 9471387, 14432100, 70235659, 936090318, 147094581, 4948380739, 9407965481

Basic calculations (n = 21087979)

Multiplication

n×y
n×2 42175958
n×3 63263937
n×4 84351916
n×5 105439895

Division

n÷y
n÷2 10543989.5
n÷3 7029326.3333333
n÷3 5271994.75
n÷5 4217595.8

Exponentiation

ny
n2 444702858304441
n3 9.377884537164E+21
n4 1.9776063218414E+29
n5 4.1703720585259E+36

Nth Root

y√n
2√n 4592.1649578385
3√n 276.27716241586
4√n 67.765514517626
5√n 29.1613074748

Divisors of 21087979

1, 11, 1917089, 21087979

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21087978
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21087979 can be divided by 4 positive divisors. The sum of these divisors (counting 21087979) is 1, the average is 0.25.

Base conversion 21087979

Base System Value
2 Binary 1010000011100011011101011
3 Ternary 1110200101021021
4 Quaternary 1100130123223
5 Quinary 20344303404
6 Senary 2031553311
8 Octal 120343353
10 Decimal 21087979
12 Duodecimal 708b837
16 Hexadecimal 141c6eb
20 Vigesimal 6bfjij
36 Base36 cjzl7

Cryptographic Hash Functions

md5 3d12e0505eb2e5a2d218ba91906d899e
sha1 c565af1e7609aaec4a0a4ae80f0db12ae2b8e00f
sha256 9c87e3f37da2727b25cb5f4d68f511338b61df736939668125abccc8f12e0572
sha512 58fc90ce8bae645b645df44de7317f5caeedd6361c2e9f2799146ef95377b1386bd3102edbb4a5faee321625e16d757c9f098d3beed886b29c4541f96eedd25e
ripemd-160 e3956e6d3d9b5c2881ef1060b664c8795a448297

21087979 as geometric shapes

Circle

Radius = n
Diameter 42175958
Circumference 132499679.81091
Area 1.3970752326796E+15

Sphere

Radius = n
Volume 3.928199089089E+22
Surface area 5.5883009307185E+15
Circumference 132499679.81091

Square

Length = n
Perimeter 84351916
Area 444702858304441
Diagonal 29822905.904839

Cube

Length = n
Surface area 2668217149826646
Volume 9.377884537164E+21
Space diagonal 36525451.056946

Equilateral Triangle

Length = n
Perimeter 63263937
Area 1.925619862136E+14
Altitude 18262725.528473

Triangular Pyramid

Length = n
Surface area 1.925619862136E+14
Volume 1.1051942915689E+21
Height 9940968.6349463