18011055 has 16 divisors (see below), whose sum is σ = 28881504. Its totient is φ = 9584640.

The previous prime is 18011039. The next prime is 18011101. The reversal of 18011055 is 55011081.

It is not a de Polignac number, because 18011055 - 2⁴ = 18011039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7615 + ... + 9695.

It is an arithmetic number, because the mean of its divisors is an integer number (1805094).

Almost surely, 2^18011055 is an apocalyptic number.

18011055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18011055 is a deficient number, since it is larger than the sum of its proper divisors (10870449).

18011055 is a wasteful number, since it uses less digits than its factorization.

18011055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 18011055 is about 4243.9433313842. The cubic root of 18011055 is about 262.1277808410.

The spelling of 18011055 in words is "eighteen million, eleven thousand, fifty-five".