18986884860 has 48 divisors (see below), whose sum is σ = 56290532256. Its totient is φ = 4765335552.

The previous prime is 18986884841. The next prime is 18986884871. The reversal of 18986884860 is 6848868981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18986884791 and 18986884800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9306277 + ... + 9308316.

It is an arithmetic number, because the mean of its divisors is an integer number (1172719422).

Almost surely, 2^18986884860 is an apocalyptic number.

18986884860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18986884860 is an abundant number, since it is smaller than the sum of its proper divisors (37303647396).

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

18986884860 is a wasteful number, since it uses less digits than its factorization.

18986884860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18614622 (or 18614620 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 66.

The spelling of 18986884860 in words is "eighteen billion, nine hundred eighty-six million, eight hundred eighty-four thousand, eight hundred sixty".