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Properties of the Number 21896

Twenty-One Thousand Eight Hundred Ninety-Six

Basics

Value: 21895 → 21896 → 21897

Parity: even

Prime: No

Previous Prime: 21893

Next Prime: 21911

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 3 × 7 × 17 × 23

Divisors: 1, 2, 4, 7, 8, 14, 17, 23, 28, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010110001000

Octal: 52610

Duodecimal: 10808

Hexadecimal: 5588

Square: 479434816

Square Root: 147.97297050475132

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

Chebyshev polynomials of the second kind, U(n,x), evaluated at x=14. A97311
Chebyshev polynomial of the second kind U(3,n). A144138
Numbers that are the sum of four third powers in eight or more ways. A345152
Numbers that are the sum of four third powers in nine or more ways. A345146
Numbers that are the sum of four third powers in six or more ways. A345148
Numbers that are the sum of four third powers in seven or more ways. A345150
a(n) = n3 - 2·n. A242135
Numbers that are the sum of four third powers in ten or more ways. A345155
Least sum of 4 distinct positive cubes in exactly n ways. A25421
Numbers that are the sum of four third powers in exactly ten ways. A345156