18308704 has 24 divisors (see below), whose sum is σ = 37943640. Its totient is φ = 8672256.

The previous prime is 18308683. The next prime is 18308707. The reversal of 18308704 is 40780381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18308707) 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, 14449 + ... + 15664.

It is an arithmetic number, because the mean of its divisors is an integer number (1580985).

Almost surely, 2^18308704 is an apocalyptic number.

It is an amenable number.

18308704 is an abundant number, since it is smaller than the sum of its proper divisors (19634936).

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

18308704 is a wasteful number, since it uses less digits than its factorization.

18308704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30142 (or 30134 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18308704 is about 4278.8671397930. The cubic root of 18308704 is about 263.5638651370.

The spelling of 18308704 in words is "eighteen million, three hundred eight thousand, seven hundred four".