21491840 (number)

21491840 is an even 8-digits composite number following 21491839 and preceding 21491841. In scientific notation, it is written as 2.1491840 × 10^7. The sum of its digits is 29. It has a total of 9 prime factors and 32 positive divisors. There are 8596480 positive integers (up to 21491840) that are relatively prime to 21491840.

Interesting facts

Basic properties

Name

Name twenty-one million four hundred ninety-one thousand eight hundred forty

Notation

Scientific notation 2.1491840 × 10^7
Engineering notation 2.1491840 × 10^6

Prime Factorization of 21491840

Prime Factorization 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 33581

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 9
Total number of prime factors
rad Radical 335810
Product of the distinct prime numbers

The prime factorization of 21491840 is 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 33581. Since it has a total of 9 prime factors.

Most popular turbo-numbers

7, 1, 18, 72, 873, 139, 6074, 6253, 496, 82281, 570568, 469343, 1191482, 3079206, 8178714, 39178203, 632976314, 757929093, 5265092246, 399433169

Basic calculations (n = 21491840)

Multiplication

n×y
n×2 42983680
n×3 64475520
n×4 85967360
n×5 107459200

Division

n÷y
n÷2 10745920
n÷3 7163946.6666667
n÷3 5372960
n÷5 4298368

Exponentiation

ny
n2 461899186585600
n3 9.9270634142279E+21
n4 2.1335085856844E+29
n5 4.5853025162155E+36

Nth Root

y√n
2√n 4635.929248813
3√n 278.02970543296
4√n 68.087658564625
5√n 29.272156591498

Divisors of 21491840

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33581, 67162, 134324, 167905, 268648, 335810, 537296, 671620, 1074592, 1343240, 2149184, 2686480, 4298368, 5372960, 10745920, 21491840

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491839
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491840 can be divided by 32 positive divisors. The sum of these divisors (counting 21491840) is 1, the average is 0.03125.

Base conversion 21491840

Base System Value
2 Binary 1010001111111000010000000
3 Ternary 1111102220021002
4 Quaternary 1101333002000
5 Quinary 21000214330
6 Senary 2044351132
8 Octal 121770200
10 Decimal 21491840
12 Duodecimal 72454a8
16 Hexadecimal 147f080
20 Vigesimal 6e69c0
36 Base36 csn7k

Cryptographic Hash Functions

md5 e3c095e926a21581262cc1e36f381867
sha1 164430255968570cc289cc4765868849e871edf0
sha256 046562889df54e4cabc0c864cc3c1462124584061efa359df110eb02cc020814
sha512 b67a3bb64ba2508311edf924247adfaf00d01d360db953d661451b60b07be5b2c3d4e49089a8110d39872eebb829955005b6f98e50108602604887c1be9eb1df
ripemd-160 b0e75a3c71b498c0c64b2f17512249d45249e1b7

21491840 as geometric shapes

Circle

Radius = n
Diameter 42983680
Circumference 135037213.31225
Area 1.4510990912764E+15

Sphere

Radius = n
Volume 4.1582385991811E+22
Surface area 5.8043963651057E+15
Circumference 135037213.31225

Square

Length = n
Perimeter 85967360
Area 461899186585600
Diagonal 30394051.608353

Cube

Length = n
Surface area 2771395119513600
Volume 9.9270634142279E+21
Space diagonal 37224958.828141

Equilateral Triangle

Length = n
Perimeter 64475520
Area 2.0000821478525E+14
Altitude 18612479.414071

Triangular Pyramid

Length = n
Surface area 2.0000821478525E+14
Volume 1.1699156429116E+21
Height 10131350.536118