Properties of the Number -18025

Eighteen Thousand Twenty-Five

Basics

Value: -18026 → -18025 → -18024

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 ² × 7 × 103

Divisors: 1, 5, 7, 25, 35, 103, 175, 515, 721, 2575

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -100011001101001

Octal: -43151

Duodecimal: -A521

Hexadecimal: -4669

Square: 324900625

Square Root: 134.25721582097552

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 integer partitions of n having a unique mode. A362608

Irregular triangle read by rows: T(n,k) is the number of free polyominoes with n cells and width k, n >= 1, 1 <= k <= ceiling(n/2). A379623

Positions of zeros in A165597. A165598

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = (-1)ⁿ * ∑_j=0..n (-k·j)^j * binomial(n,j). A362019

a(n) is the number of free polyominoes of width 3 and size n. A353067

a(n) = ∑_k=2..n binomial(k,2) * floor(n/k). A366967

Expansion of e.g.f. cos(sinh(x)*exp(x)). A9061

Denominators of continued fraction convergents to sqrt(499). A41953

Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w=R, x=R, y=R, z<R, where R = max{w,x,y,z} - min{w,x,y,z}. A212751

Expansion of e.g.f. exp(-x) / (1 + LambertW(-3·x)). A362860