18390704 has 20 divisors (see below), whose sum is σ = 36136080. Its totient is φ = 9065280.

The previous prime is 18390703. The next prime is 18390733. The reversal of 18390704 is 40709381.

It is not an unprimeable number, because it can be changed into a prime (18390703) 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 3 ways as a sum of consecutive naturals, for example, 6959 + ... + 9230.

It is an arithmetic number, because the mean of its divisors is an integer number (1806804).

Almost surely, 2^18390704 is an apocalyptic number.

It is an amenable number.

18390704 is a deficient number, since it is larger than the sum of its proper divisors (17745376).

18390704 is a wasteful number, since it uses less digits than its factorization.

18390704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16268 (or 16262 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18390704 is about 4288.4384104240. The cubic root of 18390704 is about 263.9567575332.

The spelling of 18390704 in words is "eighteen million, three hundred ninety thousand, seven hundred four".