Properties of the Number 20528

Twenty Thousand Five Hundred Twenty-Eight

Basics

Value: 20527 → 20528 → 20529

Parity: even

Prime: No

Previous Prime: 20521

Next Prime: 20533

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 1283

Divisors: 1, 2, 4, 8, 16, 1283, 2566, 5132, 10264, 20528

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000000110000

Octal: 50060

Duodecimal: BA68

Hexadecimal: 5030

Square: 421398784

Square Root: 143.27595750857853

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

Powers of cube root of 15 rounded up. A18020

Permutation of natural numbers: a(0)=0, a(1)=1, a(2n)=A005228(1+(a(n))), a(2n+1)=A030124(a(n)). A232752

The smallest position with nim-value n in subtract-a-square game. A297963

Least k >= 6 such that A087666(k) = n. A87710

Numerators of continued fraction convergents to sqrt(57). A41098

Lengths of runs of the initial digits of semiprimes in decimal representation, cf. A239634. A239639

Fibonacci sequence beginning 3, 11. A22123

Numbers such that the nonzero product of the digits of its 4th power is also a 4th power. A66734

Number of lower triangles of a 3 X 3 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less. A195249

Numbers equal to the arithmetic derivative of their Euler totient function. A248815