18240704 has 28 divisors (see below), whose sum is σ = 37179504. Its totient is φ = 8872704.

The previous prime is 18240689. The next prime is 18240707. The reversal of 18240704 is 40704281.

It is not an unprimeable number, because it can be changed into a prime (18240707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484 + ... + 6219.

Almost surely, 2^18240704 is an apocalyptic number.

It is an amenable number.

18240704 is an abundant number, since it is smaller than the sum of its proper divisors (18938800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18240704 is an equidigital number, since it uses as much as digits as its factorization.

18240704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752 (or 7742 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 18240704 is about 4270.9137195687. The cubic root of 18240704 is about 263.2371611994.

Adding to 18240704 its reverse (40704281), we get a palindrome (58944985).

The spelling of 18240704 in words is "eighteen million, two hundred forty thousand, seven hundred four".