18987881122 has 40 divisors (see below), whose sum is σ = 33351708672. Its totient is φ = 8107079400.

The previous prime is 18987881119. The next prime is 18987881161. The reversal of 18987881122 is 22118878981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1294047 + ... + 1308637.

Almost surely, 2^18987881122 is an apocalyptic number.

18987881122 is a deficient number, since it is larger than the sum of its proper divisors (14363827550).

18987881122 is an equidigital number, since it uses as much as digits as its factorization.

18987881122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14892 (or 14871 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 55.

The spelling of 18987881122 in words is "eighteen billion, nine hundred eighty-seven million, eight hundred eighty-one thousand, one hundred twenty-two".