Properties of the Number 11918

Eleven Thousand Nine Hundred Eighteen

Basics

Value: 11917 → 11918 → 11919

Parity: even

Prime: No

Previous Prime: 11909

Next Prime: 11923

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 59 × 101

Divisors: 1, 2, 59, 101, 118, 202, 5959, 11918

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111010001110

Octal: 27216

Duodecimal: 6A92

Hexadecimal: 2e8e

Square: 142038724

Square Root: 109.16959283610066

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 k such that σ(k) = σ(k+8). A15876

Number of partitions of n into sums of products. A66815

Irregular triangle in which row n has the values of k>n such that ∑_i=n..k i² is a square. A184763

Numbers n such that 8ⁿ + 3 is prime. A217354

Numbers n such that 4n + 1, 4n + 2 and 4n + 3 are not squarefree. A258332

a(n) = least value of k such that τ(k) = A000594(k) == n mod 23. A278578

Partial sums of binary rooted tree numbers. A14167

a(n) is the smallest possible side·in a family of triangles with integer sides x, y < x, x-y < z < x+y, such that exactly n pairs of triangles with equal area exist in this family. A375748

Composite numbers k such that φ(k + d(k)) = φ(k) + d(k), where φ() = A000010(), d() = A000005(). A63702

Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 n X 2 array. A219293