Properties of the Number 19660

Nineteen Thousand Six Hundred Sixty

Basics

Value: 19659 → 19660 → 19661

Parity: even

Prime: No

Previous Prime: 19609

Next Prime: 19661

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 983

Divisors: 1, 2, 4, 5, 10, 20, 983, 1966, 3932, 4915

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110011001100

Octal: 46314

Duodecimal: B464

Hexadecimal: 4ccc

Square: 386515600

Square Root: 140.21412197064888

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 representations of n as a sum of products of distinct pairs of positive integers, considered to be equivalent when terms or factors are reordered. A211856

T(n,k) = number of (n+1) X (k+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases. A206137

List of codewords in binary lexicode with Hamming distance 7 written as decimal numbers. A75937

Increasing length runs of consecutive composite numbers (endpoints). A8995

Expansion of (1-x²)/((1-2·x)*(1+x²)). A100088

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 513", based on the 5-celled von Neumann neighborhood. A282807

Numbers k such that x^k + x⁹ + 1 is irreducible over GF(2). A57479

Record values in A180076. A180080

a(n) is the number of lattice paths from (0,0) to (3n,3n) using only the steps (1,0) and (0,1) and which do not touch any other points of the form (3k,3k). A337352

Inverse binomial transform of A007910. A137505