20,740
20,740 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 4,702
- Recamán's sequence
- a(42,359) = 20,740
- Square (n²)
- 430,147,600
- Cube (n³)
- 8,921,261,224,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 46,872
- φ(n) — Euler's totient
- 7,680
- Sum of prime factors
- 87
Primality
Prime factorization: 2 2 × 5 × 17 × 61
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty thousand seven hundred forty
- Ordinal
- 20740th
- Binary
- 101000100000100
- Octal
- 50404
- Hexadecimal
- 0x5104
- Base64
- UQQ=
- One's complement
- 44,795 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵κψμʹ
- Mayan (base 20)
- 𝋢·𝋫·𝋱·𝋠
- Chinese
- 二萬零七百四十
- Chinese (financial)
- 貳萬零柒佰肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,740 = 6
- e — Euler's number (e)
- Digit 20,740 = 7
- φ — Golden ratio (φ)
- Digit 20,740 = 7
- √2 — Pythagoras's (√2)
- Digit 20,740 = 8
- ln 2 — Natural log of 2
- Digit 20,740 = 4
- γ — Euler-Mascheroni (γ)
- Digit 20,740 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20740, here are decompositions:
- 23 + 20717 = 20740
- 47 + 20693 = 20740
- 59 + 20681 = 20740
- 101 + 20639 = 20740
- 113 + 20627 = 20740
- 191 + 20549 = 20740
- 197 + 20543 = 20740
- 233 + 20507 = 20740
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 84 84 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.81.4.
- Address
- 0.0.81.4
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.81.4
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20740 first appears in π at position 135,831 of the decimal expansion (the 135,831ordinal-suffix:st 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.