18,442
18,442 is a composite number, even.
18,442 (eighteen thousand four hundred forty-two) is an even 5-digit number. It is a composite number with 4 divisors, and factors as 2 × 9,221. Written other ways, in hexadecimal, 0x480A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 19
- Digit product
- 256
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 24,481
- Recamán's sequence
- a(8,944) = 18,442
- Square (n²)
- 340,107,364
- Cube (n³)
- 6,272,260,006,888
- Divisor count
- 4
- σ(n) — sum of divisors
- 27,666
- φ(n) — Euler's totient
- 9,220
- Sum of prime factors
- 9,223
Primality
Prime factorization: 2 × 9221
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√18,442 = [135; (1, 4, 29, 1, 44, 3, 3, 44, 1, 29, 4, 1, 270)]
Period length 13 — the block in parentheses repeats forever.
Representations
- In words
- eighteen thousand four hundred forty-two
- Ordinal
- 18442nd
- Binary
- 100100000001010
- Octal
- 44012
- Hexadecimal
- 0x480A
- Base64
- SAo=
- One's complement
- 47,093 (16-bit)
- Scientific notation
- 1.8442 × 10⁴
- As a duration
- 18,442 s = 5 hours, 7 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ιηυμβʹ
- Mayan (base 20)
- 𝋢·𝋦·𝋢·𝋢
- Chinese
- 一萬八千四百四十二
- Chinese (financial)
- 壹萬捌仟肆佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,442 = 1
- e — Euler's number (e)
- Digit 18,442 = 9
- φ — Golden ratio (φ)
- Digit 18,442 = 8
- √2 — Pythagoras's (√2)
- Digit 18,442 = 8
- ln 2 — Natural log of 2
- Digit 18,442 = 2
- γ — Euler-Mascheroni (γ)
- Digit 18,442 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 18442, here are decompositions:
- 3 + 18439 = 18442
- 29 + 18413 = 18442
- 41 + 18401 = 18442
- 71 + 18371 = 18442
- 89 + 18353 = 18442
- 101 + 18341 = 18442
- 113 + 18329 = 18442
- 131 + 18311 = 18442
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 A0 8A (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.72.10.
- Address
- 0.0.72.10
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.72.10
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 18,442 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D10 (18794.5 Hz, -33¢)
- Scientific pitch (C4 = 256 Hz): D10 (18390.4 Hz, +5¢)
- Baroque pitch (A4 = 415 Hz): D♯10 (18780.8 Hz, -32¢)
The digit sequence 18442 first appears in π at position 30,623 of the decimal expansion (the 30,623ordinal-suffix:rd 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.