20,742
20,742 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 15
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 24,702
- Recamán's sequence
- a(42,355) = 20,742
- Square (n²)
- 430,230,564
- Cube (n³)
- 8,923,842,358,488
- Divisor count
- 8
- σ(n) — sum of divisors
- 41,496
- φ(n) — Euler's totient
- 6,912
- Sum of prime factors
- 3,462
Primality
Prime factorization: 2 × 3 × 3457
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty thousand seven hundred forty-two
- Ordinal
- 20742nd
- Binary
- 101000100000110
- Octal
- 50406
- Hexadecimal
- 0x5106
- Base64
- UQY=
- One's complement
- 44,793 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵κψμβʹ
- Mayan (base 20)
- 𝋢·𝋫·𝋱·𝋢
- Chinese
- 二萬零七百四十二
- Chinese (financial)
- 貳萬零柒佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,742 = 5
- e — Euler's number (e)
- Digit 20,742 = 1
- φ — Golden ratio (φ)
- Digit 20,742 = 9
- √2 — Pythagoras's (√2)
- Digit 20,742 = 9
- ln 2 — Natural log of 2
- Digit 20,742 = 5
- γ — Euler-Mascheroni (γ)
- Digit 20,742 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20742, here are decompositions:
- 11 + 20731 = 20742
- 23 + 20719 = 20742
- 61 + 20681 = 20742
- 79 + 20663 = 20742
- 101 + 20641 = 20742
- 103 + 20639 = 20742
- 131 + 20611 = 20742
- 149 + 20593 = 20742
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 84 86 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.81.6.
- Address
- 0.0.81.6
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.81.6
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20742 first appears in π at position 34,059 of the decimal expansion (the 34,059ordinal-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.