18664680 has 32 divisors (see below), whose sum is σ = 55994400. Its totient is φ = 4977216.

The previous prime is 18664673. The next prime is 18664703. The reversal of 18664680 is 8646681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77650 + ... + 77889.

It is an arithmetic number, because the mean of its divisors is an integer number (1749825).

Almost surely, 2^18664680 is an apocalyptic number.

18664680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18664680 is an abundant number, since it is smaller than the sum of its proper divisors (37329720).

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

18664680 is a wasteful number, since it uses less digits than its factorization.

18664680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155553 (or 155549 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 18664680 is about 4320.2638808295. The cubic root of 18664680 is about 265.2610694065.

The spelling of 18664680 in words is "eighteen million, six hundred sixty-four thousand, six hundred eighty".