Properties of the Number -19812

Nineteen Thousand Eight Hundred Twelve

Basics

Value: -19813 → -19812 → -19811

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 13 × 127

Divisors: 1, 2, 3, 4, 6, 12, 13, 26, 39, 52

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -100110101100100

Octal: -46544

Duodecimal: -B570

Hexadecimal: -4d64

Square: 392515344

Square Root: 140.75510647930327

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

Sum of divisors of cubes. A175926

Numbers n = concat(a,b) such that φ(n) = φ(a) * φ(b), where φ = A000010. A147619

a(n) = 1 + (9960 + (6804 + (2464 + (735 + (175 + (21 + n)*n)*n)*n)*n)*n)*n/5040. A145129

Maximal length of rook tour on an n X n+2 board. A152133

Number of paths from (0,1) to (n,2), with vertices (i,k) satisfying 0 <= k <= 3, consisting of segments given by the vectors (1,1), (1,2), (1,-1). A247355

Expansion of ∑_k>=0 (k³ * x/(1 - x))^k. A355496

Number of polyiamonds with n cells that do not tile the plane. A71333

Numbers k such that φ(k)*σ(k) is a cube. A114077

Principal diagonal of the convolution array A212891. A213436

a(n) = sum of the divisors of the product of the divisors of n. A280685