Properties of the Number 20652

Twenty Thousand Six Hundred Fifty-Two

Basics

Value: 20651 → 20652 → 20653

Parity: even

Prime: No

Previous Prime: 20641

Next Prime: 20663

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 1721

Divisors: 1, 2, 3, 4, 6, 12, 1721, 3442, 5163, 6884

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000010101100

Octal: 50254

Duodecimal: BB50

Hexadecimal: 50ac

Square: 426505104

Square Root: 143.70803735351757

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

Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = ∑_j=1..n sigma_k(j) * floor(n/j). A356045

Coefficient of·in the reduction of the n-th 2nd-kind Chebyshev polynomial by x² -> x+1. A192236

Number of domino tilings of a cross whose center is a 4 X 4 square and in which each of the four arms has length n. A220437

Positive even numbers which are neither of the form p + 2^m + 1 nor of the form p + 2^m - 1 with p prime. A270446

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 353", based on the 5-celled von Neumann neighborhood. A271307

Numbers k such that sopfr(k) = τ(k)³. A305349

Lengths of largest face diagonal in primitive Euler bricks or Pythagorean cuboids: possible values of max(d, e, f) for solutions to a² + b² = d², a² + c² = e², b² + c² = f² in coprime positive integers a, b, c, d, e, f. A306120

Numerators in canonical bijection from positive integers to positive rationals. A20652