20,009
20,009 is a composite number, odd.
20,009 (twenty thousand nine) is an odd 5-digit number. It is a composite number with 8 divisors, and factors as 11 × 17 × 107. Written other ways, in hexadecimal, 0x4E29.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 11
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 90,002
- Square (n²)
- 400,360,081
- Cube (n³)
- 8,010,804,860,729
- Divisor count
- 8
- σ(n) — sum of divisors
- 23,328
- φ(n) — Euler's totient
- 16,960
- Sum of prime factors
- 135
Primality
Prime factorization: 11 × 17 × 107
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√20,009 = [141; (2, 4, 1, 5, 4, 1, 34, 1, 1, 3, 1, 10, 1, 1, 6, 17, 1, 1, 8, 3, 16, 3, 8, 1, …)]
Period length 42 — the block in parentheses repeats forever.
Representations
- In words
- twenty thousand nine
- Ordinal
- 20009th
- Binary
- 100111000101001
- Octal
- 47051
- Hexadecimal
- 0x4E29
- Base64
- Tik=
- One's complement
- 45,526 (16-bit)
- Scientific notation
- 2.0009 × 10⁴
- As a duration
- 20,009 s = 5 hours, 33 minutes, 29 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κθʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋠·𝋩
- Chinese
- 二萬零九
- Chinese (financial)
- 貳萬零玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,009 = 3
- e — Euler's number (e)
- Digit 20,009 = 1
- φ — Golden ratio (φ)
- Digit 20,009 = 3
- √2 — Pythagoras's (√2)
- Digit 20,009 = 2
- ln 2 — Natural log of 2
- Digit 20,009 = 1
- γ — Euler-Mascheroni (γ)
- Digit 20,009 = 7
Also seen as
UTF-8 encoding: E4 B8 A9 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.78.41.
- Address
- 0.0.78.41
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.78.41
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20009 first appears in π at position 103,902 of the decimal expansion (the 103,902ordinal-suffix:nd 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.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.