Number
1,918
1,918 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,312
Primality
Prime factorization: 2 × 7 × 137
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,394
First multiples
Representations
- In words
- one thousand nine hundred eighteen
- Ordinal
- 1918th
- Roman numeral
- MCMXVIII
- Binary
- 11101111110
- Octal
- 3576
- Hexadecimal
- 77E
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1918, here are decompositions:
- 5 + 1913 = 1918
- 11 + 1907 = 1918
- 17 + 1901 = 1918
- 29 + 1889 = 1918
- 41 + 1877 = 1918
- 47 + 1871 = 1918
- 71 + 1847 = 1918
- 107 + 1811 = 1918
Showing the first eight; more decompositions exist.
Unicode codepoint
ݾ
U+077E
Other letter (Lo)
UTF-8 encoding: DD BE (2 bytes).
Hex color
#00077E
RGB(0, 7, 126)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.126.