Properties of the Number 18370

Eighteen Thousand Three Hundred Seventy

Basics

Value: 18369 → 18370 → 18371

Parity: even

Prime: No

Previous Prime: 18367

Next Prime: 18371

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 11 × 167

Divisors: 1, 2, 5, 10, 11, 22, 55, 110, 167, 334

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111000010

Octal: 43702

Duodecimal: A76A

Hexadecimal: 47c2

Square: 337456900

Square Root: 135.53597308463904

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

The 240-degree spoke (or ray) of a hexagonal spiral of Ulam. A244805

a(n) = n*(19·n - 1)/2. A22276

Coefficient of·in the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192955

Numbers n such that h(n) = 3 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.) A78420

Number of pairs (λ,μ) of partitions λ of n and μ of four with μ <= λ (by diagram containment). A303854

G.f. satisfies A(x) = x + ∏_n>=2 A(xⁿ) with A(0) = 1. A385635

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11011-01110 pattern in any orientation. A147229

Number of compositions of n into parts 1, 8, 9. A322405

Rohrbach's problem: a(n) is the largest integer such that there exists a set of n integers that is a basis of order 2 for (0, 1, ..., a(n)-1). A123509

Divisors of 279. A18370