Properties of the Number 18623

Eighteen Thousand Six Hundred Twenty-Three

Basics

Value: 18622 → 18623 → 18624

Parity: odd

Prime: No

Previous Prime: 18617

Next Prime: 18637

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 11 × 1693

Divisors: 1, 11, 1693, 18623

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100010111111

Octal: 44277

Duodecimal: A93B

Hexadecimal: 48bf

Square: 346816129

Square Root: 136.46611300978716

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 compositions (ordered partitions) of n into square parts (A000290) such that no two adjacent parts are equal (Carlitz compositions). A301503

Indices m such that A128646(m)-1 is prime, where A128646 = denominator of partial sums of 1/(p(i)-1). A137689

Least number having exactly two odd prime factors that differ by 2·n². A190052

Expansion of (1/x) * Series_Reversion( x / ((1+x)² * (1+x²*(1+x)³)) ). A387498

(p² - 3)/2 for odd primes p. A243887

Average of 4 primes where the integer Schwarzian derivative is zero. A94903

Divisors of 744. A18623

Number of nX4 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,1,2,0,4 for x=0,1,2,3,4. A196908

Number of -4..4 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having one, two or three distinct values for every i<=n and j<=n. A211690