18404055 has 12 divisors (see below), whose sum is σ = 31900440. Its totient is φ = 9815472.

The previous prime is 18404041. The next prime is 18404083. The reversal of 18404055 is 55040481.

It is not a de Polignac number, because 18404055 - 2⁶ = 18403991 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 11 ways as a sum of consecutive naturals, for example, 204445 + ... + 204534.

It is an arithmetic number, because the mean of its divisors is an integer number (2658370).

Almost surely, 2^18404055 is an apocalyptic number.

18404055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18404055 is a deficient number, since it is larger than the sum of its proper divisors (13496385).

18404055 is a wasteful number, since it uses less digits than its factorization.

18404055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408990 (or 408987 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 18404055 is about 4289.9947552415. The cubic root of 18404055 is about 264.0206165029.

The spelling of 18404055 in words is "eighteen million, four hundred four thousand, fifty-five".