21087987 (number)

21087987 is an odd 8-digits composite number following 21087986 and preceding 21087988. In scientific notation, it is written as 2.1087987 × 10^7. The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors. There are 13339040 positive integers (up to 21087987) that are relatively prime to 21087987.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1087987 × 10^7
Engineering notation 2.1087987 × 10^6

Prime Factorization of 21087987

Prime Factorization 3 × 131 × 23 × 2333

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21087987
Product of the distinct prime numbers

The prime factorization of 21087987 is 3 × 131 × 23 × 2333. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 9, 58, 53, 246, 688, 536, 6679, 73087, 82728, 766160, 26928, 3030417, 5658947, 80158523, 36489827, 436479733, 733331747, 9728536272, 116063019

Basic calculations (n = 21087987)

Multiplication

n×y
n×2 42175974
n×3 63263961
n×4 84351948
n×5 105439935

Division

n÷y
n÷2 10543993.5
n÷3 7029329
n÷3 5271996.75
n÷5 4217597.4

Exponentiation

ny
n2 444703195712169
n3 9.3778952100367E+21
n4 1.9776093227662E+29
n5 4.1703799689572E+36

Nth Root

y√n
2√n 4592.1658288873
3√n 276.27719735231
4√n 67.765520944558
5√n 29.161309687344

Divisors of 21087987

1, 3, 23, 69, 131, 393, 2333, 3013, 6999, 9039, 53659, 160977, 305623, 916869, 7029329, 21087987

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 -21087986
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 21087987 can be divided by 16 positive divisors. The sum of these divisors (counting 21087987) is 1, the average is 0.0625.

Base conversion 21087987

Base System Value
2 Binary 1010000011100011011110011
3 Ternary 1110200101021120
4 Quaternary 1100130123303
5 Quinary 20344303422
6 Senary 2031553323
8 Octal 120343363
10 Decimal 21087987
12 Duodecimal 708b843
16 Hexadecimal 141c6f3
20 Vigesimal 6bfjj7
36 Base36 cjzlf

Cryptographic Hash Functions

md5 f874206a0e6baa9f7c41d56d8e82c112
sha1 648d40fc16f01268c6caa6f820ac5fa33703a2e4
sha256 9b91edc7f5776ee78701885715e2b036671998ec7cbee5ef8cfff1695bc447cc
sha512 632b543e3d3bbb1f5679fa785fbdc53c23952b5ef54f28bd21d412e16654f8a086b8599f159ba252445d61361d0a651ba3126d90b7400f6496ec317a48241685
ripemd-160 0e58a0c53aa434a8c0b34c27813af58ec5270101

21087987 as geometric shapes

Circle

Radius = n
Diameter 42175974
Circumference 132499730.07639
Area 1.3970762926773E+15

Sphere

Radius = n
Volume 3.9282035597315E+22
Surface area 5.588305170709E+15
Circumference 132499730.07639

Square

Length = n
Perimeter 84351948
Area 444703195712169
Diagonal 29822917.218548

Cube

Length = n
Surface area 2668219174273014
Volume 9.3778952100367E+21
Space diagonal 36525464.913352

Equilateral Triangle

Length = n
Perimeter 63263961
Area 1.9256213231543E+14
Altitude 18262732.456676

Triangular Pyramid

Length = n
Surface area 1.9256213231543E+14
Volume 1.105195549379E+21
Height 9940972.4061825