Properties of the Number -18026

Eighteen Thousand Twenty-Six

Basics

Value: -18027 → -18026 → -18025

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 9013

Divisors: 1, 2, 9013, 18026

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100011001101010

Octal: -43152

Duodecimal: -A522

Hexadecimal: -466a

Square: 324936676

Square Root: 134.2609399639374

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 maximal sum-free subsets of {1,2,...,n}. A121269

Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross. A334701

Records in A333549. A333550

Expansion of ∑_{p prime} x^p/(1 - p·x^p). A373458

Let s(n,j) be ∑_i=1..j (prime(primepi(n) + i) mod n). Numbers n such that there exists j with s(n,j) = n. A274423

Row 4 of A328464: a(n) = A276156(16n - 8) / 30. A328467

a(n) = ∑_{p∣n, p prime} p^φ(n/p). A369687

Numbers of the form 5^j + 7^k, for j and k >= 0. A226818

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 190", based on the 5-celled von Neumann neighborhood. A270683

Number of (n+2) X 3 binary arrays avoiding patterns 001 and 110 in rows, columns and nw-to-se diagonals. A202440