Properties of the Number 18198

Eighteen Thousand One Hundred Ninety-Eight

Basics

Value: 18197 → 18198 → 18199

Parity: even

Prime: No

Previous Prime: 18191

Next Prime: 18199

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 337

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 337, 674

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 100011100010110

Octal: 43426

Duodecimal: A646

Hexadecimal: 4716

Square: 331167204

Square Root: 134.89996293550269

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

Total number of smallest parts in all partitions of n that do not contain 1 as a part. A195820

Greatest number m such that the fractional part of (3/2)^A153663(n) >= 1-(1/m). A153667

Those n for which A140259(n) = A002264(n+11). A140260

a(n) = 25·n² - n. A157514

a(n) = ∑_k=1..n k^floor(n/k). A345100

Number of primitive (period n) step cyclic shifted sequence structures using a maximum of four different symbols. A56441

Numbers n such that Lucas(prime(n)) is prime, where Lucas = A000032. A120561

a(n) = 729·n² - 27. A158655

Let R(i,j) be the rectangle with antidiagonals 1; 2,3; 4,5,6; ...; the n-th Fibonacci number is in antidiagonal a(n). A57042

G.f. A(x) satisfies: ∑_n>=0 ∏_k=1..n x^n+1-k + A(x)^k = 1. A306068