18887952688 has 20 divisors (see below), whose sum is σ = 39922264008. Its totient is φ = 8585432960.

The previous prime is 18887952673. The next prime is 18887952689. The reversal of 18887952688 is 88625978881.

It is not an unprimeable number, because it can be changed into a prime (18887952689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53658781 + ... + 53659132.

Almost surely, 2^18887952688 is an apocalyptic number.

It is an amenable number.

18887952688 is an abundant number, since it is smaller than the sum of its proper divisors (21034311320).

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

18887952688 is a wasteful number, since it uses less digits than its factorization.

18887952688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107317932 (or 107317926 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 70.

The spelling of 18887952688 in words is "eighteen billion, eight hundred eighty-seven million, nine hundred fifty-two thousand, six hundred eighty-eight".