number.wiki
Number

10

10 is a composite number, even, a calendar year.

Deficient Number Happy Number Harshad / Niven Power of Ten Squarefree Tetrahedral Triangular Year

Properties

Parity
Even
Digit count
2
Digit sum
1
Digital root
1
Palindrome
No
Divisor count
4
σ(n) — sum of divisors
18

Primality

Prime factorization: 2 × 5

Divisors & multiples

All divisors (4)
1 · 2 · 5 · 10
Aliquot sum (sum of proper divisors): 8
Factor pairs (a × b = 10)
1 × 10
2 × 5
First multiples
10 · 20 · 30 · 40 · 50 · 60 · 70 · 80 · 90 · 100

Representations

In words
ten
Ordinal
10th
Roman numeral
X
Binary
1010
Octal
12
Hexadecimal
A

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 10, here are decompositions:

  • 3 + 7 = 10
  • 5 + 5 = 10
ASCII character

As an ASCII codepoint, 10 is LF (line feed). ASCII control character.

Hex color
#00000A
RGB(0, 0, 10)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.10.