21906 (number)

21906 is an even 5-digits composite number following 21905 and preceding 21907. In scientific notation, it is written as 2.1906 × 10^4. The sum of its digits is 18. It has a total of 4 prime factors and 12 positive divisors. There are 7296 positive integers (up to 21906) that are relatively prime to 21906.

Interesting facts

Basic properties

Name

Name twenty-one thousand nine hundred six

Notation

Scientific notation 2.1906 × 10^4
Engineering notation 2.1906 × 10^3

Prime Factorization of 21906

Prime Factorization 2 × 3 × 3 × 1217

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 7302
Product of the distinct prime numbers

The prime factorization of 21906 is 2 × 3 × 3 × 1217. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 9, 12, 19, 248, 468, 4108, 8602, 56751, 69852, 678820, 478993, 5842754, 587247, 25683655, 66171527, 965385241, 830680851, 5081318424, 578011903

Basic calculations (n = 21906)

Multiplication

n×y
n×2 43812
n×3 65718
n×4 87624
n×5 109530

Division

n÷y
n÷2 10953
n÷3 7302
n÷3 5476.5
n÷5 4381.2

Exponentiation

ny
n2 479872836
n3 10512094345416
n4 230277938730682896
n5 5.0444685258343E+21

Nth Root

y√n
2√n 148.00675660253
3√n 27.980428499929
4√n 12.16580275208
5√n 7.38095600486

Divisors of 21906

1, 2, 3, 6, 9, 18, 1217, 2434, 3651, 7302, 10953, 21906

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 -21905
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 21906 can be divided by 12 positive divisors. The sum of these divisors (counting 21906) is 1, the average is 0.083333333333333.

Base conversion 21906

Base System Value
2 Binary 101010110010010
3 Ternary 1010001100
4 Quaternary 11112102
5 Quinary 1200111
6 Senary 245230
8 Octal 52622
10 Decimal 21906
12 Duodecimal 10816
16 Hexadecimal 5592
20 Vigesimal 2ef6
36 Base36 gwi

Cryptographic Hash Functions

md5 78dbe27fdb74c9ae3b0a6c17bffa8b18
sha1 dfbb1b22460abb02b48de843567e4fc1de3bea34
sha256 63952a79d8fa597d4d16995ca3276e6693f682e02f5bf658ed306adc11ad9d88
sha512 000d5096c65beca10845d8dd92584710e901d66b267c1050cef08fb4ae92c65ddb4706858c8c3c22786e29117398c8e4714a5056be54ba790063d8d55caa826f
ripemd-160 cb092ee893ff50df20969dbbbb6b5feda6591270

21906 as geometric shapes

Circle

Radius = n
Diameter 43812
Circumference 137639.45733908
Area 1507564976.2349

Sphere

Radius = n
Volume 44032957825869
Surface area 6030259904.9396
Circumference 137639.45733908

Square

Length = n
Perimeter 87624
Area 479872836
Diagonal 30979.762297345

Cube

Length = n
Surface area 2879237016
Volume 10512094345416
Space diagonal 37942.304990604

Equilateral Triangle

Length = n
Perimeter 65718
Area 207791033.28104
Altitude 18971.152495302

Triangular Pyramid

Length = n
Surface area 207791033.28104
Volume 1238862199352.7
Height 10326.587432448