18664316 has 24 divisors (see below), whose sum is σ = 37183104. Its totient is φ = 8114480.

The previous prime is 18664297. The next prime is 18664319. The reversal of 18664316 is 61346681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18664319) 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, 8210 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (1549296).

Almost surely, 2^18664316 is an apocalyptic number.

It is an amenable number.

18664316 is a deficient number, since it is larger than the sum of its proper divisors (18518788).

18664316 is a wasteful number, since it uses less digits than its factorization.

18664316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18481 (or 18479 counting only the distinct ones).

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

The square root of 18664316 is about 4320.2217535677. The cubic root of 18664316 is about 265.2593450148.

The spelling of 18664316 in words is "eighteen million, six hundred sixty-four thousand, three hundred sixteen".