18105285 has 32 divisors (see below), whose sum is σ = 31819392. Its totient is φ = 8718080.

The previous prime is 18105259. The next prime is 18105317. The reversal of 18105285 is 58250181.

It is not a de Polignac number, because 18105285 - 2⁹ = 18104773 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32227 + ... + 32783.

It is an arithmetic number, because the mean of its divisors is an integer number (994356).

Almost surely, 2^18105285 is an apocalyptic number.

18105285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18105285 is a deficient number, since it is larger than the sum of its proper divisors (13714107).

18105285 is a wasteful number, since it uses less digits than its factorization.

18105285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 18105285 is about 4255.0305521817. The cubic root of 18105285 is about 262.5841181662.

Subtracting 18105285 from its reverse (58250181), we obtain a square (40144896 = 6336²).

The spelling of 18105285 in words is "eighteen million, one hundred five thousand, two hundred eighty-five".