Properties of the Number 20470

Twenty Thousand Four Hundred Seventy

Basics

Value: 20469 → 20470 → 20471

Parity: even

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 23 × 89

Divisors: 1, 2, 5, 10, 23, 46, 89, 115, 178, 230

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111111110110

Octal: 47766

Duodecimal: BA1A

Hexadecimal: 4ff6

Square: 419020900

Square Root: 143.07340773183535

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

Number of spanning hypertrees with n unlabeled vertices: analog of A035053 when edges of size 1 are allowed (with no two equal edges). A134959

Sum of binary numbers with n 1's and one (possibly leading) 0. A59672

G.f.: ∑_k>=0 (1 + k·x)^k * x^2·k. A360699

Denominators of expansion of e.g.f. x²/(2*(cos(x)-1)), even powers only. A132095

Position of 5ⁿ in A051037 (5-smooth numbers). A188427

a(0) = 1, a(n) = (denominator of the Bernoulli number B_2n)/3, for n>=1. A277087

Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)² = (S_i S_j)⁷ = I. A164354

Number of nX(n+4) arrays of permutations of n+4 copies of 0..n-1 with every element equal to or 1 greater than any north, west or northeast neighbors modulo n and the upper left element equal to 0. A267396

Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north, west or northeast neighbors modulo 5 and the upper left element equal to 0. A267398

Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero. A297882