Properties of the Number 19864

Nineteen Thousand Eight Hundred Sixty-Four

Basics

Value: 19863 → 19864 → 19865

Parity: even

Prime: No

Previous Prime: 19861

Next Prime: 19867

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 13 × 191

Divisors: 1, 2, 4, 8, 13, 26, 52, 104, 191, 382

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110110011000

Octal: 46630

Duodecimal: B5B4

Hexadecimal: 4d98

Square: 394578496

Square Root: 140.93970341958294

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

Square array A(n,k) by antidiagonals. A(n,k) is the number of length 2n k-ary words (n,k>=0) that can be built by repeatedly inserting doublets into the initially empty word. A183135

Cogrowth function of the group Baumslag-Solitar(5,5). A229647

Cogrowth function of the group Baumslag-Solitar(6,6). A229648

Cogrowth function of the group Baumslag-Solitar(7,7). A229649

Cogrowth function of the group Baumslag-Solitar(8,8). A229650

Cogrowth function of the group Baumslag-Solitar(9,9). A229651

Cogrowth function of the group Baumslag-Solitar(10,10). A229652

Sum of the squarefree parts of the partitions of n into 5 parts. A309480

G.f.: 3/(1 + 2·sqrt(1-12·x)). A35610

Expansion of c(3·x²)/(1-x·c(3·x²)), c(x) the g.f. of A000108. A128386