Properties of the Number 19885

Nineteen Thousand Eight Hundred Eighty-Five

Basics

Value: 19884 → 19885 → 19886

Parity: odd

Prime: No

Previous Prime: 19867

Next Prime: 19889

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 41 × 97

Divisors: 1, 5, 41, 97, 205, 485, 3977, 19885

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110110101101

Octal: 46655

Duodecimal: B611

Hexadecimal: 4dad

Square: 395413225

Square Root: 141.01418368376991

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

Small-number statistic from the enumeration of domino tilings of a 9-pillow of order n. A112844

Triangle read by rows: T(n,k) is the number of weighted lattice paths in B(n) having k valleys. The members of B(n) are paths of weight n that start at (0,0), end on but never go below the horizontal axis, and whose steps are of the following four kinds: an (1,0)-step with weight 1, an (1,0)-step with weight 2, a (1,1)-step with weight 2, and a (1,-1)-step with weight 1. The weight of a path is the sum of the weights of its steps. A valley is a (1,-1)-step followed by a (1,1)-step. A182900

Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and 0 <= determinant <= n. A211146

Ceiling(γ(n/3)). A284997

Ceiling(γ(2n/3)). A284999

Numbers k such that 351·2^k+1 is prime. A323032

Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1. A225913

Decimal expansion of sine of 76 degrees. A19885