18668683338 has 16 divisors (see below), whose sum is σ = 37338896160. Its totient is φ = 6222639536.

The previous prime is 18668683337. The next prime is 18668683367. The reversal of 18668683338 is 83338686681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18668683337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150181 + ... + 244727.

It is an arithmetic number, because the mean of its divisors is an integer number (2333681010).

Almost surely, 2^18668683338 is an apocalyptic number.

18668683338 is an abundant number, since it is smaller than the sum of its proper divisors (18670212822).

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

18668683338 is a wasteful number, since it uses less digits than its factorization.

18668683338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127461.

The product of its digits is 23887872, while the sum is 60.

The spelling of 18668683338 in words is "eighteen billion, six hundred sixty-eight million, six hundred eighty-three thousand, three hundred thirty-eight".