Properties of the Number -18779

Eighteen Thousand Seven Hundred Seventy-Nine

Basics

Value: -18780 → -18779 → -18778

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 89 × 211

Divisors: 1, 89, 211, 18779

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100100101011011

Octal: -44533

Duodecimal: -AA4B

Hexadecimal: -495b

Square: 352650841

Square Root: 137.03649149040558

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 negated run-lengths are not unimodal. A332639

Number of partitions p of n such that the number of parts having multiplicity 1 is not a part and max(p) - min(p) is a part. A241448

a(n) = prime(n) * prime(2·n-1). A219603

G.f.: A(x) = exp( ∑_n>=1 A162415(n)²*xⁿ/n ) where A162415 is defined by: ∑_n>=0 x^2ⁿ-1 = exp( ∑_n>=1 A162415(n)*xⁿ/n ). A162416

Number of 2n-digit primes that are concatenation of n two-digit distinct primes p₁...p_n, 98>p₁>p₂>...>p_n>10. A168513

Number of n X n binary arrays with all ones connected only in a 0100-1111-0100 pattern in any orientation. A146373

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1111-0100 pattern in any orientation. A146375