20,006
20,006 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 60,002
- Square (n²)
- 400,240,036
- Cube (n³)
- 8,007,202,160,216
- Divisor count
- 8
- σ(n) — sum of divisors
- 34,320
- φ(n) — Euler's totient
- 8,568
- Sum of prime factors
- 1,438
Primality
Prime factorization: 2 × 7 × 1429
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty thousand six
- Ordinal
- 20006th
- Binary
- 100111000100110
- Octal
- 47046
- Hexadecimal
- 0x4E26
- Base64
- TiY=
- One's complement
- 45,529 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κϛʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋠·𝋦
- Chinese
- 二萬零六
- Chinese (financial)
- 貳萬零陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,006 = 5
- e — Euler's number (e)
- Digit 20,006 = 4
- φ — Golden ratio (φ)
- Digit 20,006 = 6
- √2 — Pythagoras's (√2)
- Digit 20,006 = 1
- ln 2 — Natural log of 2
- Digit 20,006 = 6
- γ — Euler-Mascheroni (γ)
- Digit 20,006 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20006, here are decompositions:
- 13 + 19993 = 20006
- 43 + 19963 = 20006
- 79 + 19927 = 20006
- 139 + 19867 = 20006
- 163 + 19843 = 20006
- 193 + 19813 = 20006
- 229 + 19777 = 20006
- 307 + 19699 = 20006
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 B8 A6 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.78.38.
- Address
- 0.0.78.38
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.78.38
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 20006 first appears in π at position 70,661 of the decimal expansion (the 70,661ordinal-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.