1,918
1,918 is a composite number, even, a calendar year.
Notable events — 1918 AD
- Jan 8 President Wilson sets out his Fourteen Points for postwar peace.
- Mar 3 The Treaty of Brest-Litovsk takes Russia out of WWI.
- Mar 11 The first cases of the Spanish flu pandemic are documented at Fort Riley, Kansas.
- Jul 17 Tsar Nicholas II and his family are executed by Bolsheviks at Yekaterinburg.
- Nov 11 An armistice signed at Compiègne ends fighting on the Western Front.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Tuesday
January 1, 1918
- Ended on
-
Tuesday
December 31, 1918
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
March 31
Sunday, March 31, 1918
- Decade
-
1910s
1910–1919
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
108
108 years before 2026.
In other calendars
- Hebrew
-
5678 / 5679 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1336 / 1337 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Horse
Sexagenary cycle position 55 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2461 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1296 / 1297 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1910 / 1911 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1840 / 1839 Saka
Indian national calendar; year starts in March.
- Japanese
-
Taishō 7
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digit product
- 72
- Digital root
- 1
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,191
- Flips to (rotate 180°)
- 8,161
- Recamán's sequence
- a(7,908) = 1,918
- Square (n²)
- 3,678,724
- Cube (n³)
- 7,055,792,632
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,312
- φ(n) — Euler's totient
- 816
- Sum of prime factors
- 146
Primality
Prime factorization: 2 × 7 × 137
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred eighteen
- Ordinal
- 1918th
- Roman numeral
- MCMXVIII
- Binary
- 11101111110
- Octal
- 3576
- Hexadecimal
- 0x77E
- Base64
- B34=
- One's complement
- 63,617 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡιηʹ
- Mayan (base 20)
- 𝋤·𝋯·𝋲
- Chinese
- 一千九百一十八
- Chinese (financial)
- 壹仟玖佰壹拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,918 = 4
- e — Euler's number (e)
- Digit 1,918 = 1
- φ — Golden ratio (φ)
- Digit 1,918 = 2
- √2 — Pythagoras's (√2)
- Digit 1,918 = 7
- ln 2 — Natural log of 2
- Digit 1,918 = 9
- γ — Euler-Mascheroni (γ)
- Digit 1,918 = 1
Also seen as
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.
UTF-8 encoding: DD BE (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.126.
- Address
- 0.0.7.126
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.126
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1918 first appears in π at position 3,337 of the decimal expansion (the 3,337ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.