Properties of the Number 20486

Twenty Thousand Four Hundred Eighty-Six

Basics

Value: 20485 → 20486 → 20487

Parity: even

Prime: No

Previous Prime: 20483

Next Prime: 20507

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 10243

Divisors: 1, 2, 10243, 20486

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000000110

Octal: 50006

Duodecimal: BA32

Hexadecimal: 5006

Square: 419676196

Square Root: 143.12931216211445

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

Row sums of the Riordan matrix (1/sqrt(1-4·x), x/(1-x)) (A187888). A188622

Consecutive states of the linear congruential pseudo-random number generator 172·s mod 30307 when started at s=1. A385032

Number of isomorphism classes of commutative monoids (commutative semigroups with identity) of order n. A58131

The eventual period of a sequence b(n, m) where b(n, 1) = 1 and the m-th term is the number of occurrences of b(n, m-1) in the list of integers from b(n, max(m-n, 1)) to b(n, m-1). A334539

Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={0,1}. A80007

The growth series for the affine Coxeter (or Weyl) group [3,3,5] (or H₄). A266783

Numbers k such that the representation of k² is a substring of that of k!, in base 10. A113621

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 0, 1)}. A151140

Average of squares of divisors is an integer: numbers k such that sigma₀(k) divides sigma₂(k). A20486

Number of nX5 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. A232292