Properties of the Number 20938

Twenty Thousand Nine Hundred Thirty-Eight

Basics

Value: 20937 → 20938 → 20939

Parity: even

Prime: No

Previous Prime: 20929

Next Prime: 20939

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 19 ² × 29

Divisors: 1, 2, 19, 29, 38, 58, 361, 551, 722, 1102

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000111001010

Octal: 50712

Duodecimal: 1014A

Hexadecimal: 51ca

Square: 438399844

Square Root: 144.69968901141425

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

Expansion of ∑_k>0 x^k/(1 - k·x^k)³. A363642

Row 4 in rectangular array A292929. A294067

Positions of 11's in A131744. A133152

Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7. A252378

a(n) = 3·n³ + n². A294315

Number of base 18 circular n-digit numbers with adjacent digits differing by 3 or less. A125328

Greatest k such that (k-th prime) < (8 times n-th prime). A20938