Properties of the Number 18740

Eighteen Thousand Seven Hundred Forty

Basics

Value: 18739 → 18740 → 18741

Parity: even

Prime: No

Previous Prime: 18731

Next Prime: 18743

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 937

Divisors: 1, 2, 4, 5, 10, 20, 937, 1874, 3748, 4685

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100100110100

Octal: 44464

Duodecimal: AA18

Hexadecimal: 4934

Square: 351187600

Square Root: 136.8941196691808

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 partitions of n into distinct parts with 2 levels of parentheses. A50343

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+937)² = y². A129974

a(n) = n·a(n-1) + 1, a(0) = 2. A38159

Pseudo-random numbers: gcc 2.6.3 version for 32-bit integers. A84276

Expansion of ∑_0<i<j<k<l<m q^2*(i+j+k+l+m-5)/( (1-q^2·i-1)*(1-q^2·j-1)*(1-q^2·k-1)*(1-q^2·l-1)*(1-q^2·m-1) )². A365667

Number of partitions of the n-th decimal palindrome into distinct decimal palindromes. A91585

Number of 4-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions. A187299

Number of 3 X 3 X 3 triangular 0..n arrays with every horizontal row nondecreasing and having the same average value. A214907

Number of (n+1) X (6+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253157

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * (1 + ∑_j=0..n j^k/j!). A368759