Properties of the Number 18085

Eighteen Thousand Eighty-Five

Basics

Value: 18084 → 18085 → 18086

Parity: odd

Prime: No

Previous Prime: 18077

Next Prime: 18089

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 3617

Divisors: 1, 5, 3617, 18085

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011010100101

Octal: 43245

Duodecimal: A571

Hexadecimal: 46a5

Square: 327067225

Square Root: 134.48048185517482

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

G.f.: 1/p(x), where p(x) = degree 22 Salem polynomial p(x) = x²² + x²¹ - x¹⁹ - 2·x¹⁸ - 3·x¹⁷ - 3·x¹⁶ - 2·x¹⁵ + 2·x¹³ + 4·x¹² + 5·x¹¹ + 4·x¹⁰ + 2·x⁹ - 2·x⁷ - 3·x⁶ - 3·x⁵ - 2·x⁴ - x³ + x + 1. A143419

Number of compositions of n with unique smallest part. A105039

Sum of the largest parts in the partitions of n into 8 parts. A308998

Number of shifted Young tableaux with height <= 3. A82395

Semiprimes (A001358) whose digit reversal is a square. A115710

Numbers k such that the continued fraction for sqrt(k) has period 93. A20432

Column 3 of triangle A091602. A91606

Semiprimes whose digit reversal is a nontrivial power. A108849

Number of partitions of 2n that describe the degree sequence of exactly one labeled multigraph with no loops. A328863

Triangle read by rows, T(n, k) = n! * [y^k] [xⁿ] exp(1/(1 - x)^{1 + y} - 1), for 0 <= k <= n. A355267