Properties of the Number 18186

Eighteen Thousand One Hundred Eighty-Six

Basics

Value: 18185 → 18186 → 18187

Parity: even

Prime: No

Previous Prime: 18181

Next Prime: 18191

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 433

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 433, 866

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100001010

Octal: 43412

Duodecimal: A636

Hexadecimal: 470a

Square: 330730596

Square Root: 134.85547819795826

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

Numbers n such that Bernoulli number B_n has denominator 1806. A272139

Symmetric triangle, read by rows, where row n equals the (n+1)-th differences of the crystal ball sequence for D_n lattice, for n>=0. A108558

Denominators of convergents to π by Farey fractions. A63673

Triangle interpolating the swinging factorial (A056040) restricted to odd indices with its binomial transform. Same as interpolating the β numbers 1/β(n,n) (A002457) with (A163869). Triangle read by rows, for n >= 0, k >= 0. A163842

Number T(n,k) of linear chord diagrams having n chords and maximal chord length k (or k=0 if n=0); triangle T(n,k), n>=0, 0<=k<=n, read by rows. A293961

Numbers that match polynomials over {0,1} that have a factor containing -3 as a coefficient; see Comments. A208182

Values of n such that n^a-+a are primes, a=5. A155021

exp(arctanh(x)*exp(x))=1+x+3/2!*x²+12/3!*x³+57/4!*x⁴+340/5!*x⁵... A12709

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 14", based on the 5-celled von Neumann neighborhood. A269709

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 406", based on the 5-celled von Neumann neighborhood. A271772