Properties of the Number 20013

Twenty Thousand Thirteen

Basics

Value: 20012 → 20013 → 20014

Parity: odd

Prime: No

Previous Prime: 20011

Next Prime: 20021

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 953

Divisors: 1, 3, 7, 21, 953, 2859, 6671, 20013

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111000101101

Octal: 47055

Duodecimal: B6B9

Hexadecimal: 4e2d

Square: 400520169

Square Root: 141.46731071169762

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 even-length strict integer partitions of 2n+1. A343942

Congruence-uniform lattices on n unlabeled nodes. A292790

Number of terms of A048103 found in range A002110(n-1) .. A002110(n)-1. A328402

Number of strict odd-length integer partitions of 2n + 1. A346634

Least natural number n in increasing order such that the sum of decimal digits is equal to A001223(n). A179462

Number of ways to arrange 3 nonattacking knights on the lower triangle of an n X n board. A194487

Number of unlabeled semidistributive lattices with n elements. A377408

Concatenations C1 and C2 and C3 and C4 are all prime (see the comment lines). A34819

T(n,k)=Number of ways to arrange k nonattacking knights on the lower triangle of an n X n board. A194492

T(n,k)=Rolling icosahedron footprints: number of nXk 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal or vertical neighbor moves along an icosahedral edge. A223263