21086987 (number)

21086987 is an odd 8-digits composite number following 21086986 and preceding 21086988. In scientific notation, it is written as 2.1086987 × 10^7. The sum of its digits is 41. It has a total of 3 prime factors and 8 positive divisors. There are 19740672 positive integers (up to 21086987) that are relatively prime to 21086987.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1086987 × 10^7
Engineering notation 2.1086987 × 10^6

Prime Factorization of 21086987

Prime Factorization 17 × 193 × 6427

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 21086987
Product of the distinct prime numbers

The prime factorization of 21086987 is 17 × 193 × 6427. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 8, 54, 58, 784, 587, 5655, 5228, 36545, 10398, 303183, 683576, 96270, 8292921, 18058152, 6278545, 729031087, 711205857, 3212416211, 1683795134

Basic calculations (n = 21086987)

Multiplication

n×y
n×2 42173974
n×3 63260961
n×4 84347948
n×5 105434935

Division

n÷y
n÷2 10543493.5
n÷3 7028995.6666667
n÷3 5271746.75
n÷5 4217397.4

Exponentiation

ny
n2 444661020738169
n3 9.3765611637125E+21
n4 1.9772342336391E+29
n5 4.1693912580703E+36

Nth Root

y√n
2√n 4592.056946511
3√n 276.27283022828
4√n 67.76471756387
5√n 29.16103311412

Divisors of 21086987

1, 17, 193, 3281, 6427, 109259, 1240411, 21086987

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21086986
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21086987 can be divided by 8 positive divisors. The sum of these divisors (counting 21086987) is 1, the average is 0.125.

Base conversion 21086987

Base System Value
2 Binary 1010000011100001100001011
3 Ternary 1110200022220112
4 Quaternary 1100130030023
5 Quinary 20344240422
6 Senary 2031544535
8 Octal 120341413
10 Decimal 21086987
12 Duodecimal 708b14b
16 Hexadecimal 141c30b
20 Vigesimal 6bfh97
36 Base36 cjytn

Cryptographic Hash Functions

md5 2827d36fef79238f99ba556533d5eb91
sha1 794ca74d58071f11939d06ca66a49476cc17267d
sha256 7fa02411271e2633dd16060f1dcc6014baccbb2993589edee2c56c79fc819a32
sha512 67d584cb8a184241b0e98a1b13c618b0856b0dcaa92653d374c02993e30809f177eaa4bcd0959982607f92702836385a8b8af0fffe71d9090295a5d0fee96f6a
ripemd-160 5099e3c19e80d87c98fa3c3c10e3ea48e7535fd7

21086987 as geometric shapes

Circle

Radius = n
Diameter 42173974
Circumference 132493446.89109
Area 1.3969437960888E+15

Sphere

Radius = n
Volume 3.9276447557139E+22
Surface area 5.5877751843551E+15
Circumference 132493446.89109

Square

Length = n
Perimeter 84347948
Area 444661020738169
Diagonal 29821503.004985

Cube

Length = n
Surface area 2667966124429014
Volume 9.3765611637125E+21
Space diagonal 36523732.862544

Equilateral Triangle

Length = n
Perimeter 63260961
Area 1.9254387001599E+14
Altitude 18261866.431272

Triangular Pyramid

Length = n
Surface area 1.9254387001599E+14
Volume 1.1050383305119E+21
Height 9940501.0016617