Properties of the Number 18501

Eighteen Thousand Five Hundred One

Basics

Value: 18500 → 18501 → 18502

Parity: odd

Prime: No

Previous Prime: 18493

Next Prime: 18503

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 881

Divisors: 1, 3, 7, 21, 881, 2643, 6167, 18501

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100001000101

Octal: 44105

Duodecimal: A859

Hexadecimal: 4845

Square: 342287001

Square Root: 136.0183811107896

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

Stella octangula numbers: a(n) = n*(2·n² - 1). A7588

Number A(n,k) of compositions of n where each part i is marked with a word of length i over a k-ary alphabet whose letters appear in alphabetical order; square array A(n,k), n>=0, k>=0, read by antidiagonals. A261780

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 0,1 0,-1 -2,0 or 1,1. A264878

Number of 5-compositions of n. A145841

Numbers n such that φ(n) = φ(n+12) and n is not divisible by 2. A217141

Number of compositions of n where each part i is marked with a word of length i over an n-ary alphabet whose letters appear in alphabetical order. A261783

a(n) = 22·n² - 1. A158540

Small rhombicuboctahedron with faces of centered polygons. A193250

a(n) = 841·n - 1. A158402

Row sums of A163233 and A163235 divided by 3. A163478