Properties of the Number 18530

Eighteen Thousand Five Hundred Thirty

Basics

Value: 18529 → 18530 → 18531

Parity: even

Prime: No

Previous Prime: 18523

Next Prime: 18539

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 17 × 109

Divisors: 1, 2, 5, 10, 17, 34, 85, 109, 170, 218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100001100010

Octal: 44142

Duodecimal: A882

Hexadecimal: 4862

Square: 343360900

Square Root: 136.12494260788506

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(1)=0, and a(n+1) is the position of first occurrence of a(n) in the decimal expansion of 1/π. A98319

Numbers k such that the k-th composition in standard order is an alternating permutation of {1..k} for some k. A349051

T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0. A267553

a(n) = 16n² + n. A157474

a(n) = n*(2*(n - 2)*n + (-1)ⁿ + 3)/4. A323724

5 times centered pentagonal numbers: 5*(5·n² + 5·n + 2)/2. A164015

Numbers k that are the product of four distinct primes such that x²+y² = k has integer solutions. A248712

The least common multiple of 1+n and 1+n². A281660

Number of collinear triples in a 3 X n rectangular grid. A57566

a(n) = floor(n⁴/64). A60494