Properties of the Number -19886

Nineteen Thousand Eight Hundred Eighty-Six

Basics

Value: -19887 → -19886 → -19885

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 × 61 × 163

Divisors: 1, 2, 61, 122, 163, 326, 9943, 19886

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110110101110

Octal: -46656

Duodecimal: -B612

Hexadecimal: -4dae

Square: 395452996

Square Root: 141.01772938180503

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 integer partitions of n whose multiplicities appear with relatively prime multiplicities. A319160

a(n) = (3·n - 1)*(4·n - 1). A33578

Numbers k such that 2^k - F(k) is prime, where F(n) is the n-th Fibonacci number. A74716

Dispersion of (floor(2·n*sqrt(2))), by antidiagonals. A191540

Number of nondecreasing sequences of 5 1..n integers with no element dividing the sequence sum. A212872

a(n) = a(n-1) + a(n-2) - a(n-4) starting a(0)=0, a(1)=1, a(2)=a(3)=3. A168637

Number of (n+2) X 6 binary arrays avoiding patterns 001 and 110 in rows, columns and nw-to-se diagonals. A202443