18516868692 has 24 divisors (see below), whose sum is σ = 49378316736. Its totient is φ = 5290533888.

The previous prime is 18516868687. The next prime is 18516868751. The reversal of 18516868692 is 29686861581.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110219373 + ... + 110219540.

It is an arithmetic number, because the mean of its divisors is an integer number (2057429864).

Almost surely, 2^18516868692 is an apocalyptic number.

18516868692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18516868692 is an abundant number, since it is smaller than the sum of its proper divisors (30861448044).

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

18516868692 is a wasteful number, since it uses less digits than its factorization.

18516868692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220438927 (or 220438925 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 60.

The spelling of 18516868692 in words is "eighteen billion, five hundred sixteen million, eight hundred sixty-eight thousand, six hundred ninety-two".