21,350
21,350 is a composite number, even.
21,350 (twenty-one thousand three hundred fifty) is an even 5-digit number. It is a composite number with 24 divisors, and factors as 2 × 5² × 7 × 61. Its proper divisors sum to 24,778, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x5366.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 11
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 5,312
- Recamán's sequence
- a(41,139) = 21,350
- Square (n²)
- 455,822,500
- Cube (n³)
- 9,731,810,375,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 46,128
- φ(n) — Euler's totient
- 7,200
- Sum of prime factors
- 80
Primality
Prime factorization: 2 × 5 2 × 7 × 61
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√21,350 = [146; (8, 1, 1, 2, 4, 2, 1, 1, 8, 292)]
Period length 10 — the block in parentheses repeats forever.
Representations
- In words
- twenty-one thousand three hundred fifty
- Ordinal
- 21350th
- Binary
- 101001101100110
- Octal
- 51546
- Hexadecimal
- 0x5366
- Base64
- U2Y=
- One's complement
- 44,185 (16-bit)
- Scientific notation
- 2.135 × 10⁴
- As a duration
- 21,350 s = 5 hours, 55 minutes, 50 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵κατνʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋧·𝋪
- Chinese
- 二萬一千三百五十
- Chinese (financial)
- 貳萬壹仟參佰伍拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,350 = 0
- e — Euler's number (e)
- Digit 21,350 = 8
- φ — Golden ratio (φ)
- Digit 21,350 = 4
- √2 — Pythagoras's (√2)
- Digit 21,350 = 1
- ln 2 — Natural log of 2
- Digit 21,350 = 4
- γ — Euler-Mascheroni (γ)
- Digit 21,350 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21350, here are decompositions:
- 3 + 21347 = 21350
- 31 + 21319 = 21350
- 37 + 21313 = 21350
- 67 + 21283 = 21350
- 73 + 21277 = 21350
- 103 + 21247 = 21350
- 139 + 21211 = 21350
- 157 + 21193 = 21350
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8D A6 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.102.
- Address
- 0.0.83.102
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.102
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21350 first appears in π at position 12,197 of the decimal expansion (the 12,197ordinal-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.