## 21877

21,877 (twenty-one thousand eight hundred seventy-seven) is an odd five-digits composite number following 21876 and preceding 21878. In scientific notation, it is written as 2.1877 × 104. The sum of its digits is 25. It has a total of 2 prime factors and 4 positive divisors. There are 21,580 positive integers (up to 21877) that are relatively prime to 21877.

## Basic properties

• Is Prime? No
• Number parity Odd
• Number length 5
• Sum of Digits 25
• Digital Root 7

## Name

Short name 21 thousand 877 twenty-one thousand eight hundred seventy-seven

## Notation

Scientific notation 2.1877 × 104 21.877 × 103

## Prime Factorization of 21877

Prime Factorization 131 × 167

Composite number
Distinct Factors Total Factors Radical ω(n) 2 Total number of distinct prime factors Ω(n) 2 Total number of prime factors rad(n) 21877 Product of the distinct prime numbers λ(n) 1 Returns the parity of Ω(n), such that λ(n) = (-1)Ω(n) μ(n) 1 Returns: 1, if n has an even number of prime factors (and is square free) −1, if n has an odd number of prime factors (and is square free) 0, if n has a squared prime factor Λ(n) 0 Returns log(p) if n is a power pk of any prime p (for any k >= 1), else returns 0

The prime factorization of 21,877 is 131 × 167. Since it has a total of 2 prime factors, 21,877 is a composite number.

## Divisors of 21877

1, 131, 167, 21877

4 divisors

 Even divisors 0 4 2 2
Total Divisors Sum of Divisors Aliquot Sum τ(n) 4 Total number of the positive divisors of n σ(n) 22176 Sum of all the positive divisors of n s(n) 299 Sum of the proper positive divisors of n A(n) 5544 Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) G(n) 147.909 Returns the nth root of the product of n divisors H(n) 3.94607 Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21,877 can be divided by 4 positive divisors (out of which 0 are even, and 4 are odd). The sum of these divisors (counting 21,877) is 22,176, the average is 5,544.

## Other Arithmetic Functions (n = 21877)

1 φ(n) n
Euler Totient Carmichael Lambda Prime Pi φ(n) 21580 Total number of positive integers not greater than n that are coprime to n λ(n) 10790 Smallest positive number such that aλ(n) ≡ 1 (mod n) for all a coprime to n π(n) ≈ 2454 Total number of primes less than or equal to n r2(n) 0 The number of ways n can be represented as the sum of 2 squares

There are 21,580 positive integers (less than 21,877) that are coprime with 21,877. And there are approximately 2,454 prime numbers less than or equal to 21,877.

## Divisibility of 21877

 m n mod m 2 3 4 5 6 7 8 9 1 1 1 2 1 2 5 7

21,877 is not divisible by any number less than or equal to 9.

## Classification of 21877

• Arithmetic
• Semiprime
• Deficient

### Expressible via specific sums

• Polite
• Non-hypotenuse

• Square Free

### Other numbers

• LucasCarmichael

## Base conversion (21877)

Base System Value
2 Binary 101010101110101
3 Ternary 1010000021
4 Quaternary 11111311
5 Quinary 1200002
6 Senary 245141
8 Octal 52565
10 Decimal 21877
12 Duodecimal 107b1
20 Vigesimal 2edh
36 Base36 gvp

## Basic calculations (n = 21877)

### Multiplication

n×i
 n×2 43754 65631 87508 109385

### Division

ni
 n⁄2 10938.5 7292.33 5469.25 4375.4

### Exponentiation

ni
 n2 478603129 10470400653133 229060955088590641 5011166514473097453157

### Nth Root

i√n
 2√n 147.909 27.9681 12.1618 7.379

## 21877 as geometric shapes

### Circle

 Diameter 43754 137457 1.50358e+09

### Sphere

 Volume 4.38583e+13 6.0143e+09 137457

### Square

Length = n
 Perimeter 87508 4.78603e+08 30938.8

### Cube

Length = n
 Surface area 2.87162e+09 1.04704e+13 37892.1

### Equilateral Triangle

Length = n
 Perimeter 65631 2.07241e+08 18946

### Triangular Pyramid

Length = n
 Surface area 8.28965e+08 1.23395e+12 17862.5
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