21521640 (number)

21521640 is an even 8-digits composite number following 21521639 and preceding 21521641. In scientific notation, it is written as 2.1521640 × 10^7. The sum of its digits is 21. It has a total of 7 prime factors and 64 positive divisors. There are 4919040 positive integers (up to 21521640) that are relatively prime to 21521640.

Interesting facts

Basic properties

Name

Name twenty-one million five hundred twenty-one thousand six hundred forty

Notation

Scientific notation 2.1521640 × 10^7
Engineering notation 2.1521640 × 10^6

Prime Factorization of 21521640

Prime Factorization 2 × 2 × 2 × 7 × 3 × 5 × 25621

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 5380410
Product of the distinct prime numbers

The prime factorization of 21521640 is 2 × 2 × 2 × 7 × 3 × 5 × 25621. Since it has a total of 7 prime factors.

Most popular turbo-numbers

Basic calculations (n = 21521640)

Multiplication

n×y
n×2 43043280
n×3 64564920
n×4 86086560
n×5 107608200

Division

n÷y
n÷2 10760820
n÷3 7173880
n÷3 5380410
n÷5 4304328

Exponentiation

ny
n2 463180988289600
n3 9.968414484813E+21
n4 2.1453662791293E+29
n5 4.617180072756E+36

Nth Root

y√n
2√n 4639.1421620813
3√n 278.15814889158
4√n 68.111248425508
5√n 29.280269688003

Divisors of 21521640

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21521639
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21521640 can be divided by 64 positive divisors. The sum of these divisors (counting 21521640) is 1, the average is 0.015625.

Base conversion 21521640

Base System Value
2 Binary 1010010000110010011101000
3 Ternary 1111111102010210
4 Quaternary 1102012103220
5 Quinary 21002143030
6 Senary 2045141120
8 Octal 122062350
10 Decimal 21521640
12 Duodecimal 725a7a0
16 Hexadecimal 14864e8
20 Vigesimal 6ea420
36 Base36 cta7c

Cryptographic Hash Functions

md5 645ef9df6dfa6ac3a2536e89d8498a9c
sha1 cce31c310287cfa866e968c3be112ed42b051a01
sha256 6dc54502d7ced72b607cc0daf73e4f9cc94f74ce5c59b5fbbebf634e761471a7
sha512 b78a159af5e25dd66a8d4dcbf66fcb8e3583accbf649bbfbac09aa75a5da325270b0af453214f33d78dbfa805def1df559705b060aa1129792a273044ecbbbdd
ripemd-160 686ee95ae73ed1ee2f4cbe21f217a18e96a2b383

21521640 as geometric shapes

Circle

Radius = n
Diameter 43043280
Circumference 135224452.23441
Area 1.4551259900931E+15

Sphere

Radius = n
Volume 4.1755596951235E+22
Surface area 5.8205039603723E+15
Circumference 135224452.23441

Square

Length = n
Perimeter 86086560
Area 463180988289600
Diagonal 30436195.172511

Cube

Length = n
Surface area 2779085929737600
Volume 9.968414484813E+21
Space diagonal 37276573.942207

Equilateral Triangle

Length = n
Perimeter 64564920
Area 2.0056325120439E+14
Altitude 18638286.971103

Triangular Pyramid

Length = n
Surface area 2.0056325120439E+14
Volume 1.1747889133149E+21
Height 10145398.390837