Properties of the Number 18447

Eighteen Thousand Four Hundred Forty-Seven

Basics

Value: 18446 → 18447 → 18448

Parity: odd

Prime: No

Previous Prime: 18443

Next Prime: 18451

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 × 13 × 43

Divisors: 1, 3, 11, 13, 33, 39, 43, 129, 143, 429

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100000001111

Octal: 44017

Duodecimal: A813

Hexadecimal: 480f

Square: 340291809

Square Root: 135.81973347050862

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

Trajectory of 3 under map x->x + (x-with-digits-reversed). A33648

Triangle of central factorial numbers 4^k T(2n+1, 2n+1-2k). A8958

Trajectory of 69 under map x->x + (x-with-digits-reversed). A33672

Triangle of scaled central factorial numbers, T(n,k) = A008958(n,n-k). A160562

Product of sexagesimal digits of Fibonacci numbers in base-60 representation. A261598

Partial sums of A051880. A50406

a(n) = C(n)*(6·n + 1) where C(n) = Catalan numbers (A000108). A50476

Partial sums of A050484. A52255

A 2nd order recursion: a(1)=a(2)=1, a(n) = prime(a(n-2)) + π(a(n-1)) = A000040(a(n-2)) + A000720(a(n-1)). A82095

Number of (w,x,y) with all terms in {0,...,n} and w ≠ max(|w-x|,|x-y|,|y-w|). A213498