18015055 has 16 divisors (see below), whose sum is σ = 22063104. Its totient is φ = 14119200.

The previous prime is 18015029. The next prime is 18015073. The reversal of 18015055 is 55051081.

It is a de Polignac number, because none of the positive numbers 2^k-18015055 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 80674 + ... + 80896.

It is an arithmetic number, because the mean of its divisors is an integer number (1378944).

Almost surely, 2^18015055 is an apocalyptic number.

18015055 is a deficient number, since it is larger than the sum of its proper divisors (4048049).

18015055 is a wasteful number, since it uses less digits than its factorization.

18015055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 18015055 is about 4244.4145650490. The cubic root of 18015055 is about 262.1471843594.

The spelling of 18015055 in words is "eighteen million, fifteen thousand, fifty-five".