18303668 has 12 divisors (see below), whose sum is σ = 32437440. Its totient is φ = 9035832.

The previous prime is 18303661. The next prime is 18303683. The reversal of 18303668 is 86630381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18303661) 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, 28646 + ... + 29277.

It is an arithmetic number, because the mean of its divisors is an integer number (2703120).

Almost surely, 2^18303668 is an apocalyptic number.

It is an amenable number.

18303668 is a deficient number, since it is larger than the sum of its proper divisors (14133772).

18303668 is a wasteful number, since it uses less digits than its factorization.

18303668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58006 (or 58004 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18303668 is about 4278.2786258027. The cubic root of 18303668 is about 263.5396975910.

The spelling of 18303668 in words is "eighteen million, three hundred three thousand, six hundred sixty-eight".