Properties of the Number -19808

Nineteen Thousand Eight Hundred Eight

Basics

Value: -19809 → -19808 → -19807

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ⁵ × 619

Divisors: 1, 2, 4, 8, 16, 32, 619, 1238, 2476, 4952

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100110101100000

Octal: -46540

Duodecimal: -B568

Hexadecimal: -4d60

Square: 392356864

Square Root: 140.74089668607346

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

Expansion of e.g.f. (1 + log(1-x))^x. A354083

Number of compositions of n whose multiplicities cover an initial interval of positive integers. A329741

Maximal length of rook tour on an n X n+4 board. A152135

Array T(n,m) read by antidiagonals: In an n X m grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; T(n,m) is the number of solutions. A375858

a(0) = 1 and a(n) = A224704(n) - A224704(n-1). A316356

Fibonacci sequence beginning 4, 30. A22387

Number of length n+4 0..8 arrays with no five consecutive elements with pattern ababa or abbba (with a≠b) and new values 0..8 introduced in 0..8 order. A244700

Number of length n+4 0..9 arrays with no five consecutive elements with pattern ababa or abbba (with a≠b) and new values 0..9 introduced in 0..9 order. A244701

Numbers n such that n!3 + 3² is prime. A247865