18004055 has 16 divisors (see below), whose sum is σ = 23030784. Its totient is φ = 13479840.

The previous prime is 18004033. The next prime is 18004061. The reversal of 18004055 is 55040081.

It is not a de Polignac number, because 18004055 - 2⁶ = 18003991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18004055.

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, 3740 + ... + 7070.

It is an arithmetic number, because the mean of its divisors is an integer number (1439424).

Almost surely, 2^18004055 is an apocalyptic number.

18004055 is a deficient number, since it is larger than the sum of its proper divisors (5026729).

18004055 is a wasteful number, since it uses less digits than its factorization.

18004055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 18004055 is about 4243.1185465410. The cubic root of 18004055 is about 262.0938177698.

The spelling of 18004055 in words is "eighteen million, four thousand, fifty-five".