18838668608 has 14 divisors (see below), whose sum is σ = 37382983146. Its totient is φ = 9419334272.

The previous prime is 18838668601. The next prime is 18838668617. The reversal of 18838668608 is 80686683881.

It can be written as a sum of positive squares in only one way, i.e., 10475931904 + 8362736704 = 102352^2 + 91448^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18838668601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 147177035 + ... + 147177162.

Almost surely, 2^18838668608 is an apocalyptic number.

It is an amenable number.

18838668608 is a deficient number, since it is larger than the sum of its proper divisors (18544314538).

18838668608 is an equidigital number, since it uses as much as digits as its factorization.

18838668608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294354209 (or 294354199 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 62.

The spelling of 18838668608 in words is "eighteen billion, eight hundred thirty-eight million, six hundred sixty-eight thousand, six hundred eight".