18545685 has 16 divisors (see below), whose sum is σ = 30364224. Its totient is φ = 9660672.

The previous prime is 18545629. The next prime is 18545687. The reversal of 18545685 is 58654581.

It is not a de Polignac number, because 18545685 - 2⁹ = 18545173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18545687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13732 + ... + 15021.

It is an arithmetic number, because the mean of its divisors is an integer number (1897764).

Almost surely, 2^18545685 is an apocalyptic number.

18545685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18545685 is a deficient number, since it is larger than the sum of its proper divisors (11818539).

18545685 is a wasteful number, since it uses less digits than its factorization.

18545685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28804.

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

The square root of 18545685 is about 4306.4701322545. The cubic root of 18545685 is about 264.6961510874.

The spelling of 18545685 in words is "eighteen million, five hundred forty-five thousand, six hundred eighty-five".