Properties of the Number 18140

Eighteen Thousand One Hundred Forty

Basics

Value: 18139 → 18140 → 18141

Parity: even

Prime: No

Previous Prime: 18133

Next Prime: 18143

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 907

Divisors: 1, 2, 4, 5, 10, 20, 907, 1814, 3628, 4535

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100011011011100

Octal: 43334

Duodecimal: A5B8

Hexadecimal: 46dc

Square: 329059600

Square Root: 134.68481725866505

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

Expansion of ψ(x⁶) / ψ(-x) in powers of·where ψ() is a Ramanujan θ function. A132217

Expansion of ψ(x⁶) / ψ(x) in powers of·where ψ() is a Ramanujan θ function. A262160

Expansion of f(-x⁶)³ / (f(x)² * ψ(x)) in powers of·where ψ(), f() are Ramanujan θ functions. A262156

Expansion of f(-x, -x⁵) * f(x³, x⁵) / f(-x, -x²)² in powers of·where f(, ) is Ramanujan's general θ function. A262987

Expansion of (1-x)/(1-2·x-x³+x⁴). A52540

Trajectory of 3 under map n->17n+1 if n odd, n->n/2 if n even. A37106

Number of base 18 circular n-digit numbers with adjacent digits differing by 6 or less. A125406

Number of nX(n+2) arrays of permutations of n+2 copies of 0..n-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo n and the upper left element equal to 0. A267341

Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 6 and the upper left element equal to 0. A267346

Numbers k such that 10^k - 8001 is prime. A270448