20,988
20,988 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 27
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 88,902
- Recamán's sequence
- a(41,863) = 20,988
- Square (n²)
- 440,496,144
- Cube (n³)
- 9,245,133,070,272
- Divisor count
- 36
- σ(n) — sum of divisors
- 58,968
- φ(n) — Euler's totient
- 6,240
- Sum of prime factors
- 74
Primality
Prime factorization: 2 2 × 3 2 × 11 × 53
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty thousand nine hundred eighty-eight
- Ordinal
- 20988th
- Binary
- 101000111111100
- Octal
- 50774
- Hexadecimal
- 0x51FC
- Base64
- Ufw=
- One's complement
- 44,547 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κϡπηʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋩·𝋨
- Chinese
- 二萬零九百八十八
- Chinese (financial)
- 貳萬零玖佰捌拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,988 = 5
- e — Euler's number (e)
- Digit 20,988 = 5
- φ — Golden ratio (φ)
- Digit 20,988 = 6
- √2 — Pythagoras's (√2)
- Digit 20,988 = 8
- ln 2 — Natural log of 2
- Digit 20,988 = 6
- γ — Euler-Mascheroni (γ)
- Digit 20,988 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20988, here are decompositions:
- 5 + 20983 = 20988
- 7 + 20981 = 20988
- 29 + 20959 = 20988
- 41 + 20947 = 20988
- 59 + 20929 = 20988
- 67 + 20921 = 20988
- 89 + 20899 = 20988
- 101 + 20887 = 20988
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 87 BC (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.81.252.
- Address
- 0.0.81.252
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.81.252
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20988 first appears in π at position 106,396 of the decimal expansion (the 106,396ordinal-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.