Properties of the Number 18087

Eighteen Thousand Eighty-Seven

Basics

Value: 18086 → 18087 → 18088

Parity: odd

Prime: No

Previous Prime: 18077

Next Prime: 18089

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 6029

Divisors: 1, 3, 6029, 18087

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011010100111

Octal: 43247

Duodecimal: A573

Hexadecimal: 46a7

Square: 327139569

Square Root: 134.48791767292704

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

a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly n ways, or 0 if no such number exists. A350405

a(n) = ∑_k=1..n (-1)^k+1 * floor(n/k)³. A344721

Number of ways to select a nonempty subset s from an n-set and then partition s into blocks of equal size. A262280

Number of magic labelings with magic sum n of 2nd graph shown in link. A244870

Number of different figures obtained by a putting two Young diagrams of partitions λ and μ, such that |λ| + |μ| = n on top of each other. A225751

Numbers k such that 6·prime(k) -+ {1,5} are all prime. A174393

Irregular triangle read by rows: row n gives for the Julian Green game with n cards labeled 1, 2, ..., n, for n >= 2, the number of games if the first removed card has label K = 2·k, for k = 1, 2, ..., floor(n/2). A348843

Powers of fourth root of 15 rounded down. A18087