Properties of the Number 20442

Twenty Thousand Four Hundred Forty-Two

Basics

Value: 20441 → 20442 → 20443

Parity: even

Prime: No

Previous Prime: 20441

Next Prime: 20443

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 3407

Divisors: 1, 2, 3, 6, 3407, 6814, 10221, 20442

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111111011010

Octal: 47732

Duodecimal: B9B6

Hexadecimal: 4fda

Square: 417875364

Square Root: 142.97552238058094

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 A090086(k), the smallest pseudoprime to base k (not necessarily exceeding k), is a Carmichael number. A293203

Numbers n such that the hexagonal number H(n) is equal to the sum of four consecutive squares. A252747

Multiply successively by 1,1,2,2,3,3,4,4,..., n >= 1, a(0) = 1. A10551

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly six 1's. A20442

Number of (n+1) X (2+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). A234551