Properties of the Number -18470

Eighteen Thousand Four Hundred Seventy

Basics

Value: -18471 → -18470 → -18469

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 1847

Divisors: 1, 2, 5, 10, 1847, 3694, 9235, 18470

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -100100000100110

Octal: -44046

Duodecimal: -A832

Hexadecimal: -4826

Square: 341140900

Square Root: 135.90437814875574

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) = smallest number m > 0 such that n followed by m 1's yields a prime, or -1 if no such m exists. A69568

Expansion of ∑_k>=1 φ(k) * x^k/(1 - x^k)⁴, where φ = Euler totient function (A000010). A309323

Smallest number m >= 0 such that n followed by m ones yields a prime; a(p) = -1 if no such m exists. A83747

"BFK" (reversible, size, unlabeled) transform of 2,2,2,2... A32043

Number of (w,x,y,z) with all terms in {1,...,n} and 2∣w-x|=|x-y|+|y-z|. A212575

a(n) is the number of free polyiamonds of n cells with chessboard coloring. A359689

a(n) = (n³ + 6·n² + 17·n + 6)/6. A341209