19,013
19,013 is a prime, odd.
19,013 (nineteen thousand thirteen) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x4A45.
Interestingness
Properties
Primality
19,013 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√19,013 = [137; (1, 7, 1, 8, 1, 24, 5, 1, 4, 1, 3, 1, 5, 2, 9, 2, 1, 1, 2, 1, 68, 4, 1, 1, …)]
Representations
- In words
- nineteen thousand thirteen
- Ordinal
- 19013th
- Binary
- 100101001000101
- Octal
- 45105
- Hexadecimal
- 0x4A45
- Base64
- SkU=
- One's complement
- 46,522 (16-bit)
- Scientific notation
- 1.9013 × 10⁴
- As a duration
- 19,013 s = 5 hours, 16 minutes, 53 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιθιγʹ
- Mayan (base 20)
- 𝋢·𝋧·𝋪·𝋭
- Chinese
- 一萬九千零一十三
- Chinese (financial)
- 壹萬玖仟零壹拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 19,013 = 3
- e — Euler's number (e)
- Digit 19,013 = 7
- φ — Golden ratio (φ)
- Digit 19,013 = 5
- √2 — Pythagoras's (√2)
- Digit 19,013 = 0
- ln 2 — Natural log of 2
- Digit 19,013 = 1
- γ — Euler-Mascheroni (γ)
- Digit 19,013 = 3
Also seen as
UTF-8 encoding: E4 A9 85 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.74.69.
- Address
- 0.0.74.69
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.74.69
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 19,013 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D10 (18794.5 Hz, +20¢)
- Scientific pitch (C4 = 256 Hz): D♯10 (19484 Hz, -42¢)
- Baroque pitch (A4 = 415 Hz): D♯10 (18780.8 Hz, +21¢)
The digit sequence 19013 first appears in π at position 316,304 of the decimal expansion (the 316,304ordinal-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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.