Properties of the Number 20968

Twenty Thousand Nine Hundred Sixty-Eight

Basics

Value: 20967 → 20968 → 20969

Parity: even

Prime: No

Previous Prime: 20963

Next Prime: 20981

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 2621

Divisors: 1, 2, 4, 8, 2621, 5242, 10484, 20968

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000111101000

Octal: 50750

Duodecimal: 10174

Hexadecimal: 51e8

Square: 439657024

Square Root: 144.80331487918363

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 triangular partitions of n of order 3. A84439

The maximum possible number of rooted triples consistent with any galled-tree (level-1 phylogenetic network) containing exactly n leaves. A216499

Expansion of ∑_0<i<j<k<l q^2*(i+j+k+l-4)/( (1-q^2·i-1)*(1-q^2·j-1)*(1-q^2·k-1)*(1-q^2·l-1) )². A365666

Length of period of continued fraction expansion of square root of 3ⁿ+1. A62328

Number of binary strings of length n with no substrings equal to 0000 0111 or 1001. A164442

Number of 6-ary rooted trees with n nodes and height exactly 7. A36645

Similar to A152396, but here the requirement is for finding any n primes, not necessarily from the shortest concatenations. A152397

Expansion of 1/((1-7·x)*(1-8·x)*(1-11·x)). A20968