Properties of the Number 20507

Twenty Thousand Five Hundred Seven

Basics

Value: 20506 → 20507 → 20508

Parity: odd

Prime: Yes

Previous Prime: 20483

Next Prime: 20509

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 20507

Divisors: 1, 20507

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000011011

Octal: 50033

Duodecimal: BA4B

Hexadecimal: 501b

Square: 420537049

Square Root: 143.20265360669822

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

Least n-gap prime: a(n) = least prime p for which there is no prime between n·p and n·q, where q is the next prime after p. A195325

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

Primes that are the average of the members of emirp pairs. A178581

Prime time primes (of the form HMMSS with primes H < 24 and MM, SS < 60) such that the corresponding number of seconds after midnight is also prime. A295000

Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600·H+60·MM+SS, is also prime. A295011

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

Primes in A051022. A92908

Primes of the form m*(m+1)/2 + 4. A159048

Chen primes A109611(k) which have the same sum-of-digits as their index k. A176012

Smallest member of a pair of consecutive twin prime pairs that have three primes between them. A89635