Properties of the Number 21636

Twenty-One Thousand Six Hundred Thirty-Six

Basics

Value: 21635 → 21636 → 21637

Parity: even

Prime: No

Previous Prime: 21617

Next Prime: 21647

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 601

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 36, 601

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010010000100

Octal: 52204

Duodecimal: 10630

Hexadecimal: 5484

Square: 468116496

Square Root: 147.09180806557515

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 partitions of n into relatively prime parts. Also aperiodic partitions. A837

-1 + number of partitions of n. A65

Number of integer partitions of n whose product of parts is not n. A379736

Number of integer partitions of n that cannot be partitioned into two or more blocks with equal sums. A321451

Numbers which converge to 2592 under repeated application of the powertrain map of A133500. A135384

Number of partitions of n into parts all relatively prime to n. A57562

Numbers that are the sum of seven fourth powers in six or more ways. A345572

Numbers that are the sum of seven fourth powers in seven or more ways. A345573

Numbers that are the sum of seven fourth powers in eight or more ways. A345574

Numbers that are the sum of seven fourth powers in exactly eight ways. A345830