Properties of the Number 18885

Eighteen Thousand Eight Hundred Eighty-Five

Basics

Value: 18884 → 18885 → 18886

Parity: odd

Prime: No

Previous Prime: 18869

Next Prime: 18899

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 1259

Divisors: 1, 3, 5, 15, 1259, 3777, 6295, 18885

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100111000101

Octal: 44705

Duodecimal: AB19

Hexadecimal: 49c5

Square: 356643225

Square Root: 137.4227055475186

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

Numbers k such that the Woodall number k·2^k - 1 is prime. A2234

Numbers k such that k and k + 1 are both lazy-Lucas-Niven numbers (A351719). A351720

Numbers n such that Maple 9.5, Maple 10, Maple 11 and Maple 12 give the wrong answers for the number of partitions of n. A110375

Expansion of 1/(1 - x/(1 - x)³)². A382616

Numbers divisible by prime(d) for each digit d in their base-6 representation, none of which may be zero. A256876

Expansion of e.g.f. 2/(1 + sqrt(1 + 4·LambertW(-x))). A295267

Triangle read by rows: T(n,k) is the number of ordered trees having n edges and k branches of length 2. A101307

Numbers k such that (k·2^d - 1)*(d·2^k - 1) is semiprime for some divisor d of k. A382646

Numbers n such that 105·2ⁿ-1 is prime. A50578

Number of primitive Pythagorean triangles with perimeter equal to A002110(n), the product of the first n primes. A77177