21,354
21,354 is a composite number, even.
21,354 (twenty-one thousand three hundred fifty-four) is an even 5-digit number. It is a composite number with 8 divisors, and factors as 2 × 3 × 3,559. Its proper divisors sum to 21,366, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x536A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 15
- Digit product
- 120
- Digital root
- 6
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 45,312
- Recamán's sequence
- a(41,131) = 21,354
- Square (n²)
- 455,993,316
- Cube (n³)
- 9,737,281,269,864
- Divisor count
- 8
- σ(n) — sum of divisors
- 42,720
- φ(n) — Euler's totient
- 7,116
- Sum of prime factors
- 3,564
Primality
Prime factorization: 2 × 3 × 3559
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√21,354 = [146; (7, 1, 2, 4, 1, 28, 2, 2, 2, 1, 2, 12, 1, 10, 1, 3, 3, 1, 6, 5, 6, 41, 1, 1, …)]
Representations
- In words
- twenty-one thousand three hundred fifty-four
- Ordinal
- 21354th
- Binary
- 101001101101010
- Octal
- 51552
- Hexadecimal
- 0x536A
- Base64
- U2o=
- One's complement
- 44,181 (16-bit)
- Scientific notation
- 2.1354 × 10⁴
- As a duration
- 21,354 s = 5 hours, 55 minutes, 54 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κατνδʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋧·𝋮
- Chinese
- 二萬一千三百五十四
- Chinese (financial)
- 貳萬壹仟參佰伍拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,354 = 6
- e — Euler's number (e)
- Digit 21,354 = 1
- φ — Golden ratio (φ)
- Digit 21,354 = 6
- √2 — Pythagoras's (√2)
- Digit 21,354 = 2
- ln 2 — Natural log of 2
- Digit 21,354 = 0
- γ — Euler-Mascheroni (γ)
- Digit 21,354 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21354, here are decompositions:
- 7 + 21347 = 21354
- 13 + 21341 = 21354
- 31 + 21323 = 21354
- 37 + 21317 = 21354
- 41 + 21313 = 21354
- 71 + 21283 = 21354
- 107 + 21247 = 21354
- 127 + 21227 = 21354
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8D AA (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.106.
- Address
- 0.0.83.106
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.106
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21354 first appears in π at position 164,154 of the decimal expansion (the 164,154ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.