21491868 (number)

21491868 is an even 8-digits composite number following 21491867 and preceding 21491869. In scientific notation, it is written as 2.1491868 × 10^7. The sum of its digits is 39. It has a total of 4 prime factors and 12 positive divisors. There are 7163952 positive integers (up to 21491868) that are relatively prime to 21491868.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1491868 × 10^7
Engineering notation 2.1491868 × 10^6

Prime Factorization of 21491868

Prime Factorization 2 × 2 × 3 × 1790989

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 10745934
Product of the distinct prime numbers

The prime factorization of 21491868 is 2 × 2 × 3 × 1790989. Since it has a total of 4 prime factors.

Most popular turbo-numbers

3, 2, 71, 89, 328, 90, 9417, 4442, 71743, 20845, 945864, 623773, 2296607, 6014029, 74156524, 35723806, 206959229, 31032398, 4894506561, 9439306550

Basic calculations (n = 21491868)

Multiplication

n×y
n×2 42983736
n×3 64475604
n×4 85967472
n×5 107459340

Division

n÷y
n÷2 10745934
n÷3 7163956
n÷3 5372967
n÷5 4298373.6

Exponentiation

ny
n2 461900390129424
n3 9.9271022138101E+21
n4 2.1335197040171E+29
n5 4.5853323854135E+36

Nth Root

y√n
2√n 4635.9322687028
3√n 278.02982617379
4√n 68.087680741106
5√n 29.272164218765

Divisors of 21491868

1, 2, 3, 4, 6, 12, 1790989, 3581978, 5372967, 7163956, 10745934, 21491868

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491867
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491868 can be divided by 12 positive divisors. The sum of these divisors (counting 21491868) is 1, the average is 0.083333333333333.

Base conversion 21491868

Base System Value
2 Binary 1010001111111000010011100
3 Ternary 1111102220022010
4 Quaternary 1101333002130
5 Quinary 21000214433
6 Senary 2044351220
8 Octal 121770234
10 Decimal 21491868
12 Duodecimal 7245510
16 Hexadecimal 147f09c
20 Vigesimal 6e69d8
36 Base36 csn8c

Cryptographic Hash Functions

md5 dc3ff8614b2905c5e9e534f7e6a65b5a
sha1 b84e5832b8b0b2c59f177e570109c363684674af
sha256 0d5544435e7657d8fe7e4a49d529cb21f8512bc3dd3d75033ab327f28e19fcf3
sha512 ed6ab3fafb45910327faae352b85e1fec6bf6e8e4567ad865eb18ff5b3f07b8cd7d13a21a95963abfc0a385b0ec278a7651ba6b0a91ac124d428b7b65b59cecd
ripemd-160 1d2efdf49363d13f1d3a31d944a6c7d6bb2155b6

21491868 as geometric shapes

Circle

Radius = n
Diameter 42983736
Circumference 135037389.24144
Area 1.4511028723209E+15

Sphere

Radius = n
Volume 4.1582548515121E+22
Surface area 5.8044114892834E+15
Circumference 135037389.24144

Square

Length = n
Perimeter 85967472
Area 461900390129424
Diagonal 30394091.206332

Cube

Length = n
Surface area 2771402340776544
Volume 9.9271022138101E+21
Space diagonal 37225007.325564

Equilateral Triangle

Length = n
Perimeter 64475604
Area 2.0000873593501E+14
Altitude 18612503.662782

Triangular Pyramid

Length = n
Surface area 2.0000873593501E+14
Volume 1.1699202154862E+21
Height 10131363.735444