20,804
20,804 is a composite number, even.
20,804 (twenty thousand eight hundred four) is an even 5-digit number. It is a composite number with 12 divisors, and factors as 2² × 7 × 743. Its proper divisors sum to 20,860, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x5144.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 40,802
- Recamán's sequence
- a(42,231) = 20,804
- Square (n²)
- 432,806,416
- Cube (n³)
- 9,004,104,678,464
- Divisor count
- 12
- σ(n) — sum of divisors
- 41,664
- φ(n) — Euler's totient
- 8,904
- Sum of prime factors
- 754
Primality
Prime factorization: 2 2 × 7 × 743
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√20,804 = [144; (4, 4, 5, 3, 4, 1, 13, 1, 1, 1, 1, 2, 1, 3, 1, 3, 1, 1, 1, 5, 1, 10, 1, 2, …)]
Representations
- In words
- twenty thousand eight hundred four
- Ordinal
- 20804th
- Binary
- 101000101000100
- Octal
- 50504
- Hexadecimal
- 0x5144
- Base64
- UUQ=
- One's complement
- 44,731 (16-bit)
- Scientific notation
- 2.0804 × 10⁴
- As a duration
- 20,804 s = 5 hours, 46 minutes, 44 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κωδʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋠·𝋤
- Chinese
- 二萬零八百零四
- Chinese (financial)
- 貳萬零捌佰零肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,804 = 9
- e — Euler's number (e)
- Digit 20,804 = 1
- φ — Golden ratio (φ)
- Digit 20,804 = 5
- √2 — Pythagoras's (√2)
- Digit 20,804 = 3
- ln 2 — Natural log of 2
- Digit 20,804 = 9
- γ — Euler-Mascheroni (γ)
- Digit 20,804 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20804, here are decompositions:
- 31 + 20773 = 20804
- 61 + 20743 = 20804
- 73 + 20731 = 20804
- 97 + 20707 = 20804
- 163 + 20641 = 20804
- 193 + 20611 = 20804
- 211 + 20593 = 20804
- 241 + 20563 = 20804
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 85 84 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.81.68.
- Address
- 0.0.81.68
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.81.68
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20804 first appears in π at position 1,282 of the decimal expansion (the 1,282ordinal-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.