18045500685 has 32 divisors (see below), whose sum is σ = 29441553408. Its totient is φ = 9434979840.

The previous prime is 18045500657. The next prime is 18045500717. The reversal of 18045500685 is 58600554081.

It is not a de Polignac number, because 18045500685 - 2⁵ = 18045500653 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1041604 + ... + 1058786.

It is an arithmetic number, because the mean of its divisors is an integer number (920048544).

Almost surely, 2^18045500685 is an apocalyptic number.

18045500685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18045500685 is a deficient number, since it is larger than the sum of its proper divisors (11396052723).

18045500685 is a wasteful number, since it uses less digits than its factorization.

18045500685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18565.

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 18045500685 in words is "eighteen billion, forty-five million, five hundred thousand, six hundred eighty-five".