Properties of the Number 18944

Eighteen Thousand Nine Hundred Forty-Four

Basics

Value: 18943 → 18944 → 18945

Parity: even

Prime: No

Previous Prime: 18919

Next Prime: 18947

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ⁹ × 37

Divisors: 1, 2, 4, 8, 16, 32, 37, 64, 74, 128

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101000000000

Octal: 45000

Duodecimal: AB68

Hexadecimal: 4a00

Square: 358875136

Square Root: 137.63720427268203

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

Maximum sum of products of successive pairs in a permutation of order n+1. A101986

Rhonda numbers in sexagesimal number system. A255731

Number of compositions of n avoiding the pattern (2,1,2). A335473

Numbers of the form p⁹*q where p and q are distinct primes. A179692

Numbers k such that (number of prime factors of k counted with multiplicity) less (number of distinct prime factors of k) = 8. A195092

a(n) = 2·n*(7·n - 3). A316466

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, vertically or antidiagonally. A232579

Triangle read by rows: T(n,k) number of arrangements of non-attacking rooks on an n X n right triangular board where the top rook is in row k (n >= 0, 1 <= k <= n+1). A259691

Triangle T(n,k) giving number of fixed 5 X k polyominoes with n cells (n >= 5, 1<=k<=n-4). A59681

a(n) = (4·n - 3) * 2^{n - 1}. A118415