21909 (number)

21909 is an odd 5-digits composite number following 21908 and preceding 21910. In scientific notation, it is written as 2.1909 × 10^4. The sum of its digits is 21. It has a total of 3 prime factors and 8 positive divisors. There are 14256 positive integers (up to 21909) that are relatively prime to 21909.

Interesting facts

Basic properties

Name

Name twenty-one thousand nine hundred nine

Notation

Scientific notation 2.1909 × 10^4
Engineering notation 2.1909 × 10^3

Prime Factorization of 21909

Prime Factorization 3 × 109 × 67

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 21909
Product of the distinct prime numbers

The prime factorization of 21909 is 3 × 109 × 67. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 3, 55, 80, 28, 750, 5353, 2884, 99507, 46955, 900912, 555538, 1149575, 5227863, 25516342, 92284874, 595690758, 511665724, 8326828121, 5453910679

Basic calculations (n = 21909)

Multiplication

n×y
n×2 43818
n×3 65727
n×4 87636
n×5 109545

Division

n÷y
n÷2 10954.5
n÷3 7303
n÷3 5477.25
n÷5 4381.8

Exponentiation

ny
n2 480004281
n3 10516413792429
n4 230404109778326961
n5 5.0479236411334E+21

Nth Root

y√n
2√n 148.01689092803
3√n 27.981705736819
4√n 12.166219253656
5√n 7.3811581563723

Divisors of 21909

1, 3, 67, 109, 201, 327, 7303, 21909

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21908
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21909 can be divided by 8 positive divisors. The sum of these divisors (counting 21909) is 1, the average is 0.125.

Base conversion 21909

Base System Value
2 Binary 101010110010101
3 Ternary 1010001110
4 Quaternary 11112111
5 Quinary 1200114
6 Senary 245233
8 Octal 52625
10 Decimal 21909
12 Duodecimal 10819
16 Hexadecimal 5595
20 Vigesimal 2ef9
36 Base36 gwl

Cryptographic Hash Functions

md5 4fb68a3bcb11bde10e8821b55674278a
sha1 cb9a4dfdf733b5f575c49c963a2bbc6acfef962c
sha256 0319f714167d2572ca7bb38cf97e7a540e59aca5cce4a9eb912b8fea2a54c6e5
sha512 fcb9a2ea5b9014d24c2b88f5dcf4ff5c4f9a394a5f57c922a87694b2c46cc1ede5441a6e66a19687981c75055e37f6ec8082994a00875731b9241f65f074a12c
ripemd-160 68b7442c972d8e4caa244ad1e6695065b05fe039

21909 as geometric shapes

Circle

Radius = n
Diameter 43818
Circumference 137658.306895
Area 1507977922.8813

Sphere

Radius = n
Volume 44051051083207
Surface area 6031911691.525
Circumference 137658.306895

Square

Length = n
Perimeter 87636
Area 480004281
Diagonal 30984.004938032

Cube

Length = n
Surface area 2880025686
Volume 10516413792429
Space diagonal 37947.501143027

Equilateral Triangle

Length = n
Perimeter 65727
Area 207847950.63564
Altitude 18973.750571513

Triangular Pyramid

Length = n
Surface area 207847950.63564
Volume 1239371251065
Height 10328.001646011