Properties of the Number 20966

Twenty Thousand Nine Hundred Sixty-Six

Basics

Value: 20965 → 20966 → 20967

Parity: even

Prime: No

Previous Prime: 20963

Next Prime: 20981

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 11 × 953

Divisors: 1, 2, 11, 22, 953, 1906, 10483, 20966

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000111100110

Octal: 50746

Duodecimal: 10172

Hexadecimal: 51e6

Square: 439573156

Square Root: 144.79640879524604

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

Numbers that are the sum of 11 positive 8th powers. A3389

Number T(n,k) of parts in all proper k-times partitions of n; triangle T(n,k), n >= 1, 0 <= k <= n-1, read by rows. A327631

a(n) = ∑_k=1..n floor((n/k) * floor((n/k) * floor(n/k))). A24922

Number of even parts in the partitions of n into 8 parts. A309630

Triangle read by rows, the Riordan square of the number of achiral m-color cyclic compositions of n (A308747). T(n,k) for 1 <= k <= n. A336452

a(n) = ∑_k>=1 floor(n·sqrt(2)^2-k). A20966