18003055 has 16 divisors (see below), whose sum is σ = 25542720. Its totient is φ = 11918592.

The previous prime is 18003023. The next prime is 18003067. The reversal of 18003055 is 55030081.

It is not a de Polignac number, because 18003055 - 2⁵ = 18003023 is a prime.

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, 7854 + ... + 9883.

It is an arithmetic number, because the mean of its divisors is an integer number (1596420).

Almost surely, 2^18003055 is an apocalyptic number.

18003055 is a deficient number, since it is larger than the sum of its proper divisors (7539665).

18003055 is a wasteful number, since it uses less digits than its factorization.

18003055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17778.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 18003055 is about 4243.0007070468. Note that the first 3 decimals coincide. The cubic root of 18003055 is about 262.0889651839.

The spelling of 18003055 in words is "eighteen million, three thousand, fifty-five".