18368668 has 24 divisors (see below), whose sum is σ = 34186320. Its totient is φ = 8611200.

The previous prime is 18368663. The next prime is 18368671. The reversal of 18368668 is 86686381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6480 + ... + 8872.

It is an arithmetic number, because the mean of its divisors is an integer number (1424430).

Almost surely, 2^18368668 is an apocalyptic number.

It is an amenable number.

18368668 is a deficient number, since it is larger than the sum of its proper divisors (15817652).

18368668 is a wasteful number, since it uses less digits than its factorization.

18368668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517 (or 2515 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 18368668 is about 4285.8684067526. The cubic root of 18368668 is about 263.8512898322.

The spelling of 18368668 in words is "eighteen million, three hundred sixty-eight thousand, six hundred sixty-eight".