Properties of the Number 20935

Twenty Thousand Nine Hundred Thirty-Five

Basics

Value: 20934 → 20935 → 20936

Parity: odd

Prime: No

Previous Prime: 20929

Next Prime: 20939

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 53 × 79

Divisors: 1, 5, 53, 79, 265, 395, 4187, 20935

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000111000111

Octal: 50707

Duodecimal: 10147

Hexadecimal: 51c7

Square: 438274225

Square Root: 144.68932234273544

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

Numbers k such that σ(k) = σ(k+10). A15880

a(n) = (n/3 + 7/9)*2^{n - 1} + (-1)ⁿ/9. A127984

Numbers m with C(2·m, m) + prime(m) prime, where C(2·m, m) = (2·m)!/(m!)². A236242

Expansion of 1 / ( (1+x)*(2·x+1)*(-1+2·x)² ). A140787

Binomial transform of [1, 4, 6, 4, 1, 1, -1, 1, -1, 1, ...]. A140227

Array read by antidiagonals: T(n,k) is the number of directed loopless multigraphs with n arcs and k vertices. A333361

Greatest k such that (k-th prime) < (5 times n-th prime). A20935