Properties of the Number 18492

Eighteen Thousand Four Hundred Ninety-Two

Basics

Value: 18491 → 18492 → 18493

Parity: even

Prime: No

Previous Prime: 18481

Next Prime: 18493

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 23 × 67

Divisors: 1, 2, 3, 4, 6, 12, 23, 46, 67, 69

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100000111100

Octal: 44074

Duodecimal: A850

Hexadecimal: 483c

Square: 341954064

Square Root: 135.9852933224766

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

Number of points on surface of cuboctahedron (or icosahedron): a(0) = 1; for n > 0, a(n) = 10n² + 2. Also coordination sequence for f.c.c. or A₃ or D₃ lattice. A5901

11-gonal (or hendecagonal) pyramidal numbers: a(n) = n*(n+1)*(3·n-2)/2. A7586

T(n,k) = Number of n X k 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. A302081

G.f.: (1+x)/∏_m>0 (1 - x^m). A84376

a(n) = 16·n² - 4. A158443

Numbers k such that k | sigma₁₁(k). A55715

Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 7 (most significant digit on right). A61936

75-gonal numbers: a(n) = n*(73·n-71)/2. A98230

Number of n X 6 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. A302079

Number of 5 X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. A302084