18090055 has 8 divisors (see below), whose sum is σ = 22456800. Its totient is φ = 13972896.

The previous prime is 18090053. The next prime is 18090089. The reversal of 18090055 is 55009081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18090055 - 2¹ = 18090053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62235 + ... + 62524.

It is an arithmetic number, because the mean of its divisors is an integer number (2807100).

Almost surely, 2^18090055 is an apocalyptic number.

18090055 is a deficient number, since it is larger than the sum of its proper divisors (4366745).

18090055 is a wasteful number, since it uses less digits than its factorization.

18090055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124793.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 18090055 is about 4253.2405292906. The cubic root of 18090055 is about 262.5104697260.

The spelling of 18090055 in words is "eighteen million, ninety thousand, fifty-five".