Properties of the Number 20958

Twenty Thousand Nine Hundred Fifty-Eight

Basics

Value: 20957 → 20958 → 20959

Parity: even

Prime: No

Previous Prime: 20947

Next Prime: 20959

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 499

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 499, 998

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000111011110

Octal: 50736

Duodecimal: 10166

Hexadecimal: 51de

Square: 439237764

Square Root: 144.76878116500117

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 more than one part of least multiplicity. A362609

The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {2,3} for all i from 1 to n-1. A174703

T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3. A184231

Number of partitions of n containing at least one prime. A235945

Sum of n-th antidiagonal of array in A082002. A82005

Number of labeled strongly connected n-state 2-input automata. A27834

Triangle of coefficients of polynomials v(n,x) jointly generated with A208919; see the Formula section. A208920

a(0) = 1, a(n) = 31·n² + 2 for n>0. A10020

Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n). A338217

Number of partitions of prime(n) containing at least one prime. A343813