18386648 has 16 divisors (see below), whose sum is σ = 39400080. Its totient is φ = 7879968.

The previous prime is 18386647. The next prime is 18386651. The reversal of 18386648 is 84668381.

It is a junction number, because it is equal to n+sod(n) for n = 18386599 and 18386608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18386647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164111 + ... + 164222.

It is an arithmetic number, because the mean of its divisors is an integer number (2462505).

Almost surely, 2^18386648 is an apocalyptic number.

It is an amenable number.

18386648 is an abundant number, since it is smaller than the sum of its proper divisors (21013432).

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

18386648 is a wasteful number, since it uses less digits than its factorization.

18386648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328346 (or 328342 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 18386648 is about 4287.9654849357. The cubic root of 18386648 is about 263.9373512193.

The spelling of 18386648 in words is "eighteen million, three hundred eighty-six thousand, six hundred forty-eight".