Properties of the Number 18318

Eighteen Thousand Three Hundred Eighteen

Basics

Value: 18317 → 18318 → 18319

Parity: even

Prime: No

Previous Prime: 18313

Next Prime: 18329

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 43 × 71

Divisors: 1, 2, 3, 6, 43, 71, 86, 129, 142, 213

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011110001110

Octal: 43616

Duodecimal: A726

Hexadecimal: 478e

Square: 335549124

Square Root: 135.3440061472986

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

Difference between the arithmetic mean of the neighbors of the terms and the term itself follows the pattern 0,1,2,3,4,5,... A86514

Coefficient of x² in the minimal polynomial of the continued fraction [1ⁿ,2^1/3,1,1,...], where 1ⁿ means n ones. A267080

Least integer k such that k/2ⁿ > sqrt(5). A293332

The integer k that minimizes |k/2ⁿ - sqrt(5)|. A293333

Number of sets of exactly n positive integers <= n+8 having a square element sum. A281971

Records in A336830. A362398

a(n) = 6+32·n²+8·n*(7+8·n²)/3. A167498

Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor. A206337

Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4. A240756

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7. A252426