18384055 has 16 divisors (see below), whose sum is σ = 23467104. Its totient is φ = 13777920.

The previous prime is 18384043. The next prime is 18384059. The reversal of 18384055 is 55048381.

It is not a de Polignac number, because 18384055 - 2⁷ = 18383927 is a prime.

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 18384055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18384059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26260 + ... + 26950.

It is an arithmetic number, because the mean of its divisors is an integer number (1466694).

Almost surely, 2^18384055 is an apocalyptic number.

18384055 is a deficient number, since it is larger than the sum of its proper divisors (5083049).

18384055 is a wasteful number, since it uses less digits than its factorization.

18384055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 18384055 is about 4287.6631164307. The cubic root of 18384055 is about 263.9249432712.

The spelling of 18384055 in words is "eighteen million, three hundred eighty-four thousand, fifty-five".