18688470208 has 14 divisors (see below), whose sum is σ = 37084933196. Its totient is φ = 9344235072.

The previous prime is 18688470181. The next prime is 18688470211. The reversal of 18688470208 is 80207488681.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 146003610 + ... + 146003737.

Almost surely, 2^18688470208 is an apocalyptic number.

It is an amenable number.

18688470208 is a deficient number, since it is larger than the sum of its proper divisors (18396462988).

18688470208 is an equidigital number, since it uses as much as digits as its factorization.

18688470208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292007359 (or 292007349 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 52.

The spelling of 18688470208 in words is "eighteen billion, six hundred eighty-eight million, four hundred seventy thousand, two hundred eight".