18684680 has 48 divisors (see below), whose sum is σ = 48909420. Its totient is φ = 6405504.

The previous prime is 18684647. The next prime is 18684703. The reversal of 18684680 is 8648681.

It can be written as a sum of positive squares in 2 ways, for example, as 17522596 + 1162084 = 4186^2 + 1078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2807 + ... + 6726.

Almost surely, 2^18684680 is an apocalyptic number.

18684680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18684680 is an abundant number, since it is smaller than the sum of its proper divisors (30224740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18684680 is a wasteful number, since it uses less digits than its factorization.

18684680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9558 (or 9547 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 18684680 is about 4322.5779345201. The cubic root of 18684680 is about 265.3557817650.

The spelling of 18684680 in words is "eighteen million, six hundred eighty-four thousand, six hundred eighty".