18745684 has 12 divisors (see below), whose sum is σ = 32937408. Its totient is φ = 9335000.

The previous prime is 18745681. The next prime is 18745693. The reversal of 18745684 is 48654781.

It is a self number, because there is not a number n which added to its sum of digits gives 18745684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18745681) 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, 8332 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (2744784).

Almost surely, 2^18745684 is an apocalyptic number.

It is an amenable number.

18745684 is a deficient number, since it is larger than the sum of its proper divisors (14191724).

18745684 is a wasteful number, since it uses less digits than its factorization.

18745684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18926 (or 18924 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 18745684 is about 4329.6286214871. The cubic root of 18745684 is about 265.6442565786.

The spelling of 18745684 in words is "eighteen million, seven hundred forty-five thousand, six hundred eighty-four".