Properties of the Number -18570

Eighteen Thousand Five Hundred Seventy

Basics

Value: -18571 → -18570 → -18569

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 619

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 619, 1238

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100100010001010

Octal: -44212

Duodecimal: -A8B6

Hexadecimal: -488a

Square: 344844900

Square Root: 136.27178724886528

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) = 4ⁿ + 3ⁿ - 1. A155602

Number of ways to write n as an ordered sum of 10 squares of positive integers. A340947

Number of polyhexes with n hexagons, having reflectional symmetry (see Harary and Read for precise definition). A2215

a(n) is the minimal area of a convex lattice polygon with 2n sides. A89187

G.f. satisfies: A(x) = ∑_n>=0 binomial(n*(n+1),n)/(n+1) * xⁿ/A(x)ⁿ. A295763

a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1, a(2) = 2, and a(3) = 3. A49910

Expansion of 1 - 3·x - sqrt(1 - 6·x + 5·x²). A122737

Number of (n+1) X 3 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively. A204645

Numbers k such that Bernoulli number B_k has denominator 14322. A295588

Catafusenes (see reference for precise definition). A44044