18078108 has 12 divisors (see below), whose sum is σ = 42182280. Its totient is φ = 6026032.

The previous prime is 18078097. The next prime is 18078113. The reversal of 18078108 is 80187081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 753243 + ... + 753266.

It is an arithmetic number, because the mean of its divisors is an integer number (3515190).

Almost surely, 2^18078108 is an apocalyptic number.

It is an amenable number.

18078108 is an abundant number, since it is smaller than the sum of its proper divisors (24104172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18078108 is a wasteful number, since it uses less digits than its factorization.

18078108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506516 (or 1506514 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 18078108 is about 4251.8358387878. The cubic root of 18078108 is about 262.4526681100.

The spelling of 18078108 in words is "eighteen million, seventy-eight thousand, one hundred eight".