Properties of the Number 11818

Eleven Thousand Eight Hundred Eighteen

Basics

Value: 11817 → 11818 → 11819

Parity: even

Prime: No

Previous Prime: 11813

Next Prime: 11821

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 19 × 311

Divisors: 1, 2, 19, 38, 311, 622, 5909, 11818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111000101010

Octal: 27052

Duodecimal: 6A0A

Hexadecimal: 2e2a

Square: 139665124

Square Root: 108.71062505569546

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

Number of non-isomorphic strict T₀ multiset partitions of weight n. A319560

Numbers which are divisible by prime(d) for all digits d in their decimal representation. A256786

a(n) = n*(8·n+7). A139278

Row sums of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1+x-x²)ⁿ. A104507

Numbers consisting of ones and eights. A213084

a(n) = number of steps required to reach 0 from F(n+2) by repeatedly subtracting from a natural number the number of ones in its Zeckendorf representation. Here F(n) = the n-th Fibonacci number, F(0) = 0, F(1) = 1, F(2) = 1, F(3) = 2, ... A261082

a(0) = 0, a(1) = 1, for n > 1, a(n) = a(n-1) + a(n-A002487(n)). A283474

a(1) = 1; for n>1, a(n) = a(n-1)*b(n-1) + 1, where {b(k)} is the concatenated list of the ordered positive divisors of the terms of {a(k)}. A129645

a(n) = A205110(n)/n. A205111

First differences of A283474. A283479