Properties of the Number 18347

Eighteen Thousand Three Hundred Forty-Seven

Basics

Value: 18346 → 18347 → 18348

Parity: odd

Prime: No

Previous Prime: 18341

Next Prime: 18353

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 × 2621

Divisors: 1, 7, 2621, 18347

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100011110101011

Octal: 43653

Duodecimal: A74B

Hexadecimal: 47ab

Square: 336612409

Square Root: 135.45109818676258

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

Expansion of e.g.f. ( ∏_k>0 1/(1-x^k)^1/k! )^1/(1-x). A356025

a(n) = (a(n-1) + a(n-3))/gcd(a(n-1), a(n-3)) with a(0) =2, a(1) = 3, a(2) = 5. A214331

Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k LL's (n >= 0; 0 <= k <= n-2 for n >= 2). A128724

Integers n > 1997 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 1997. A63055

Triangle of coefficients, read by rows of (2n+1) terms, where the n-th row forms a polynomial in x, P(n,x), of degree 2n and satisfies: P(n,x) = [∑_k=1..n 1/(k + x + x²)]*[∏_k=1..n (k + x + x²)]. A74248

Interprimes which are of the form s·prime, s=7. A75282

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0111-0010 pattern in any orientation. A146457

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation. A146907

Numbers k such that (13·10^k + 311)/9 is prime. A295031

Numbers n such that ω(n)=4 but bigomega(n)>4, i.e., having exactly 4 distinct prime factors, but at least one of these with multiplicity > 1. A200521