Properties of the Number 20668

Twenty Thousand Six Hundred Sixty-Eight

Basics

Value: 20667 → 20668 → 20669

Parity: even

Prime: No

Previous Prime: 20663

Next Prime: 20681

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5167

Divisors: 1, 2, 4, 5167, 10334, 20668

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101000010111100

Octal: 50274

Duodecimal: BB64

Hexadecimal: 50bc

Square: 427166224

Square Root: 143.76369499981558

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 integer partitions of n with all distinct run-sums. A353837

Number of blocks in all RNA secondary structures with n nodes (an RNA secondary structure can be viewed as a restricted noncrossing partition). A110320

Low temperature series associated with square lattice. A47710

Numbers of the form x² + 4·y². A20668

Odd numbers 2n+1 such that k + 2^m is prime, where k and m are the odd part and 2-valuation, respectively, of 2n. A332075

Indices n of odd numbers 2n+1 such that k + 2^m is prime, where k and m are the odd part and 2-valuation, respectively, of 2n. A332076