Properties of the Number -18471

Eighteen Thousand Four Hundred Seventy-One

Basics

Value: -18472 → -18471 → -18470

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 47 × 131

Divisors: 1, 3, 47, 131, 141, 393, 6157, 18471

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100100000100111

Octal: -44047

Duodecimal: -A833

Hexadecimal: -4827

Square: 341177841

Square Root: 135.9080571562996

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) = ∑_{k=0..floor(n/2)} (-1)^k * binomial(n-k,k) * Catalan(k). A360024

a(n) = n * ∑_d∣n binomial(d+2,3)/d. A343544

Expansion of ∏_k=1..9 (1+x^2·k-1)/(1-x^2·k). A316721

Numbers k such that k and k² use only the digits 1, 3, 4, 7 and 8. A137028

Number of nonisomorphic magmas with n elements satisfying the equations (xy)y = x and x(yz) = xy. A362642

Quasi-Carmichael numbers to base -9: squarefree composites n such that prime p∣n ==> p+9∣n+9. A29569

Satisfies A³ = BINOMIAL(A090358²), where A090358⁶ = BINOMIAL(A090358⁵). A90360

Row sums of the triangular array A357431. A357417

Values of Newton-Gregory forward interpolating polynomial (1/3)*(2·n-7)*(2·n²-11·n+18). A30434

Values of Newton-Gregory forward interpolating polynomial (1/3)*(2·n - 3)*(2·n² - 3·n + 4). A30441