Properties of the Number 19680

Nineteen Thousand Six Hundred Eighty

Basics

Value: 19679 → 19680 → 19681

Parity: even

Prime: No

Previous Prime: 19661

Next Prime: 19681

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ⁵ × 3 × 5 × 41

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100110011100000

Octal: 46340

Duodecimal: B480

Hexadecimal: 4ce0

Square: 387302400

Square Root: 140.28542333400145

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

Strongly refactorable numbers: numbers n such that if n is divisible by d, it is divisible by the number of divisors of d. A141586

The sequence λ(3,n), where λ is defined in A055203. Number of ways of placing n identifiable positive intervals with a total of exactly three starting and/or finishing points. A58809

Number of Lyndon compositions of n whose reverse is not a co-Lyndon composition. A329324

Numbers k such that σ (x) = k has exactly 12 solutions. A60676

Number of regions formed inside square by diagonals and the segments joining the vertices to the points dividing the sides into n equal length segments. A108914

a(n) = n⁹ - n. A196289

Number of ways to seat 4 types of people in n labeled seats around a circle such that no two adjacent people are of the same type. A218034

Number of integer partitions of the n-th semiprime into semiprimes. A338902

Generalized tangent numbers d_n,2. A176

Numbers of the form p⁵*q·r*s where p, q, r, and s are distinct primes. A179704