Properties of the Number 20445

Twenty Thousand Four Hundred Forty-Five

Basics

Value: 20444 → 20445 → 20446

Parity: odd

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 29 × 47

Divisors: 1, 3, 5, 15, 29, 47, 87, 141, 145, 235

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111111011101

Octal: 47735

Duodecimal: B9B9

Hexadecimal: 4fdd

Square: 417998025

Square Root: 142.98601330200097

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

Heinz numbers of integer partitions whose reciprocal sum is 1. A316855

Heinz numbers of aperiodic integer partitions into relatively prime parts whose reciprocal sum is 1. A316888

Numbers n for which there are exactly six k such that n = k + (product of nonzero digits of k). A96927

Matrix cube-root of triangle A107717. A107719

First trisection of A061037 (Balmer line series of the hydrogen atom). A142590

Expansion of (1-x⁵) / (1-x)⁵. A8487

Numbers n such that (n / sum of digits of n) is a golden semiprime. A108780

Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is 1. A316890

Terms of A050530 with four prime divisors. A53340

Numbers k such that 5·3^k + 2 is prime. A58590