18488961988 has 24 divisors (see below), whose sum is σ = 37007600000. Its totient is φ = 7917481728.

The previous prime is 18488961899. The next prime is 18488961991. The reversal of 18488961988 is 88916988481.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229368 + ... + 299311.

Almost surely, 2^18488961988 is an apocalyptic number.

It is an amenable number.

18488961988 is an abundant number, since it is smaller than the sum of its proper divisors (18518638012).

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

18488961988 is a wasteful number, since it uses less digits than its factorization.

18488961988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529939 (or 529937 counting only the distinct ones).

The product of its digits is 63700992, while the sum is 70.

The spelling of 18488961988 in words is "eighteen billion, four hundred eighty-eight million, nine hundred sixty-one thousand, nine hundred eighty-eight".