Properties of the Number 21044

Twenty-One Thousand Forty-Four

Basics

Value: 21043 → 21044 → 21045

Parity: even

Prime: No

Previous Prime: 21031

Next Prime: 21059

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5261

Divisors: 1, 2, 4, 5261, 10522, 21044

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001000110100

Octal: 51064

Duodecimal: 10218

Hexadecimal: 5234

Square: 442849936

Square Root: 145.06550244630873

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 powerful numbers <= 10ⁿ. A118896

Number of 9-element subsets of [n] whose sum is a triangular number. A320855

Powerful numbers, definition (1): if a prime p divides n then p² must also divide n (also called squareful, square full, square-full or 2-powerful numbers). A1694

Expansion of g.f. 1/((1 - x)*(1 - 2·x)*(1 - 3·x)*(1 - 8·x)). A21044