18818684 has 12 divisors (see below), whose sum is σ = 32963784. Its totient is φ = 9400464.

The previous prime is 18818671. The next prime is 18818687. The reversal of 18818684 is 48681881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18818687) 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, 5642 + ... + 8334.

It is an arithmetic number, because the mean of its divisors is an integer number (2746982).

Almost surely, 2^18818684 is an apocalyptic number.

It is an amenable number.

18818684 is a deficient number, since it is larger than the sum of its proper divisors (14145100).

18818684 is a wasteful number, since it uses less digits than its factorization.

18818684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444 (or 4442 counting only the distinct ones).

The product of its digits is 98304, while the sum is 44.

The square root of 18818684 is about 4338.0507143186. The cubic root of 18818684 is about 265.9886365206.

The spelling of 18818684 in words is "eighteen million, eight hundred eighteen thousand, six hundred eighty-four".