Properties of the Number 20481

Twenty Thousand Four Hundred Eighty-One

Basics

Value: 20480 → 20481 → 20482

Parity: odd

Prime: No

Previous Prime: 20479

Next Prime: 20483

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 6827

Divisors: 1, 3, 6827, 20481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000000001

Octal: 50001

Duodecimal: BA29

Hexadecimal: 5001

Square: 419471361

Square Root: 143.11184437355283

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

a(n) = (n-1)*2ⁿ + 1. A337

Numbers that are the sum of 11 positive 11th powers. A4822

a(0) = 6; for n>0, a(n) = 2·a(n-1) - 1. A83575

An 11th-order Fibonacci sequence: a(n) = a(n-1) + ... + a(n-11). A127624

a(n) = 20·n² + 1. A158493

Semiprimes q such that q²-4 and q²+4 are also semiprimes. A173084

a(n) = 5·4ⁿ+1. A199115

Triangle of coefficients of polynomials u(n,x) jointly generated with A210198; see the Formula section. A210197

Sum of numbers in the n-th antidiagonal of the reciprocity array of 3. A259583

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 710", based on the 5-celled von Neumann neighborhood. A283701