Properties of the Number 20497

Twenty Thousand Four Hundred Ninety-Seven

Basics

Value: 20496 → 20497 → 20498

Parity: odd

Prime: No

Previous Prime: 20483

Next Prime: 20507

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 103 × 199

Divisors: 1, 103, 199, 20497

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000010001

Octal: 50021

Duodecimal: BA41

Hexadecimal: 5011

Square: 420127009

Square Root: 143.16773379501402

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

Expansion of e.g.f. exp(x) / (1 - x³). A330044

Numbers containing only 1's and 0's in their base-2, base-3, and base-4 representations. A258981

Partial sums of A151791. A151792

a(n) = (3·n+2)! * ∑_k=0..n 1 / (3·k+2)!. A337726

Expansion of e.g.f. exp(t·x)/(1 - x²/t² - t³* x³). A158757

Numbers whose base-4 representation contains exactly four 0's and four 1's. A45037

Expansion of e.g.f.: exp(t·x)/(1 - x²/t - t³*x³). A158785

Semiprimes whose binary and ternary representations are prime when read in decimal. A279052

G.f. A(x) satisfies: A(x) = x·exp(3 * ∑_k>=1 (-1)^k * A(x^k) / k). A345885

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), (-1, 0, 0), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}. A149637