20,042
20,042 is a composite number, even.
20,042 (twenty thousand forty-two) is an even 5-digit number. It is a composite number with 8 divisors, and factors as 2 × 11 × 911. Written other ways, in hexadecimal, 0x4E4A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 24,002
- Square (n²)
- 401,681,764
- Cube (n³)
- 8,050,505,914,088
- Divisor count
- 8
- σ(n) — sum of divisors
- 32,832
- φ(n) — Euler's totient
- 9,100
- Sum of prime factors
- 924
Primality
Prime factorization: 2 × 11 × 911
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√20,042 = [141; (1, 1, 3, 12, 40, 2, 1, 2, 1, 1, 1, 1, 1, 6, 1, 4, 1, 10, 16, 1, 1, 3, 2, 8, …)]
Period length 58 — the block in parentheses repeats forever.
Representations
- In words
- twenty thousand forty-two
- Ordinal
- 20042nd
- Binary
- 100111001001010
- Octal
- 47112
- Hexadecimal
- 0x4E4A
- Base64
- Tko=
- One's complement
- 45,493 (16-bit)
- Scientific notation
- 2.0042 × 10⁴
- As a duration
- 20,042 s = 5 hours, 34 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵κμβʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋢·𝋢
- Chinese
- 二萬零四十二
- Chinese (financial)
- 貳萬零肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,042 = 1
- e — Euler's number (e)
- Digit 20,042 = 9
- φ — Golden ratio (φ)
- Digit 20,042 = 5
- √2 — Pythagoras's (√2)
- Digit 20,042 = 9
- ln 2 — Natural log of 2
- Digit 20,042 = 8
- γ — Euler-Mascheroni (γ)
- Digit 20,042 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20042, here are decompositions:
- 13 + 20029 = 20042
- 19 + 20023 = 20042
- 31 + 20011 = 20042
- 79 + 19963 = 20042
- 151 + 19891 = 20042
- 181 + 19861 = 20042
- 199 + 19843 = 20042
- 223 + 19819 = 20042
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 B9 8A (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.78.74.
- Address
- 0.0.78.74
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.78.74
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 20042 first appears in π at position 21,556 of the decimal expansion (the 21,556ordinal-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.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.