Properties of the Number 20347

Twenty Thousand Three Hundred Forty-Seven

Basics

Value: 20346 → 20347 → 20348

Parity: odd

Prime: Yes

Previous Prime: 20341

Next Prime: 20353

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 20347

Divisors: 1, 20347

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111101111011

Octal: 47573

Duodecimal: B937

Hexadecimal: 4f7b

Square: 414000409

Square Root: 142.64291079475348

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Discriminants of imaginary quadratic fields with class number 25 (negated). A56987

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d=2,4 or 6) and forming d-pattern=[6, 4,2]; short d-string notation of pattern = [642]. A78855

Luhn primes: primes p such that p + (p reversed) is also a prime. A61783

The array in A059216 read by antidiagonals in 'up' direction. A59217

Beginnings of maximal chains of primes with five members (four links). A152868

Prime time primes on 6-digit clocks, second definition: primes of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60. A295013

Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60. A295014

Second member of a sexy prime quadruple: value of p+6 such that p, p+6, p+12 and p+18 are all prime. A46122

Let A = A025584. a(n) is the smallest A(m) such that the interval (A(m)*n, A(m+1)*n) contains no primes from A. A207820

Prime-generating polynomial: a(n) = 16·n² - 300·n + 1447. A181973