Properties of the Number 20711

Twenty Thousand Seven Hundred Eleven

Basics

Value: 20710 → 20711 → 20712

Parity: odd

Prime: No

Previous Prime: 20707

Next Prime: 20717

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 139 × 149

Divisors: 1, 139, 149, 20711

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000011100111

Octal: 50347

Duodecimal: BB9B

Hexadecimal: 50e7

Square: 428945521

Square Root: 143.91316826475608

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

Products of 2 successive primes. A6094

Numbers that are the sum of 11 positive 8th powers. A3389

Numbers that are the sum of 7 positive 9th powers. A3396

Number of compositions of n whose run-lengths are weakly increasing. A332836

Sequence of pairwise relatively prime numbers of class P₃ (see comment). A275246

a(n) = a(n-2) + a(n-3) + a(n-4), with initial values a(0) = 0, a(1) = 2, a(2) = 3, a(3) = 6. A1634

a(n) = A050376(n)*A050376(n+1) where A050376(n) is the n-th number of the form p^{2^k} with p is prime and k >= 0. A240521

Least odd number k such that x' = k has n solutions, where x' is the arithmetic derivative (A003415) of x. A189560

Denominators of continued fraction convergents to sqrt(893). A42727

Numbers that are both a sum and a product of two or more consecutive primes. A254859