Properties of the Number 20927

Twenty Thousand Nine Hundred Twenty-Seven

Basics

Value: 20926 → 20927 → 20928

Parity: odd

Prime: No

Previous Prime: 20921

Next Prime: 20929

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 17 × 1231

Divisors: 1, 17, 1231, 20927

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000110111111

Octal: 50677

Duodecimal: 1013B

Hexadecimal: 51bf

Square: 437939329

Square Root: 144.66167426101498

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 positive solutions to (x₁)² + (x₂)² + ... + (x₆)² <= n². A341425

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)*b(n), where a(0) = 2, a(1) = 3, b(0) = 1, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A296269

Number of proper multisets of nonempty words with a total of n letters over n-ary alphabet such that if a letter occurs in the multiset all predecessors occur at least once. A320265

a(n) = d(n)/2, where d = A026040. A26041

a(n) = 8·a(n-1)-13·a(n-2) for n > 1; a(0) = 5, a(1) = 23. A162815

Expansion of (1-4·x)^15/2. A20927

Number of n X 6 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing. A223775