18235384 has 8 divisors (see below), whose sum is σ = 34191360. Its totient is φ = 9117688.

The previous prime is 18235369. The next prime is 18235387. The reversal of 18235384 is 48353281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18235387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139704 + ... + 1139719.

It is an arithmetic number, because the mean of its divisors is an integer number (4273920).

Almost surely, 2^18235384 is an apocalyptic number.

It is an amenable number.

18235384 is a deficient number, since it is larger than the sum of its proper divisors (15955976).

18235384 is a wasteful number, since it uses less digits than its factorization.

18235384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279429 (or 2279425 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 18235384 is about 4270.2908566045. The cubic root of 18235384 is about 263.2115671970.

The spelling of 18235384 in words is "eighteen million, two hundred thirty-five thousand, three hundred eighty-four".