Properties of the Number 18226

Eighteen Thousand Two Hundred Twenty-Six

Basics

Value: 18225 → 18226 → 18227

Parity: even

Prime: No

Previous Prime: 18223

Next Prime: 18229

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 13 × 701

Divisors: 1, 2, 13, 26, 701, 1402, 9113, 18226

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100110010

Octal: 43462

Duodecimal: A66A

Hexadecimal: 4732

Square: 332187076

Square Root: 135.00370365289984

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

Diagonal in array of n-gonal numbers A081422. A81437

Smallest palindromic numbers of length 4 in two bases differing by n. A216843

T(n,k) = number of n X k 0..k-1 arrays with no column j greater than column j-1 in all rows. A212930

Number of compositions of n into twin primes (i.e., primes that are members of a twin prime pair, like 3, 5, 7, 11, 13, but not 2 or 23). A77608

Second (k=2) triangle of numbers related to totally asymmetric exclusion process (case α=1, β=1). A115127

a(n) = 9·n² + 1. A247792

Number of pairs with two different elements which can be obtained by selecting unique elements from two sets with n+1 and n² elements respectively and n common elements. A85490

Expansion of (1+x³*C)*C, where C = (1-(1-4·x)^1/2)/(2·x) is g.f. for Catalan numbers, A000108. A71726

Smallest squarefree integer k such that Q(sqrt(k)) has class number n. A81363

Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly three lines cross. A336489