18728858886 has 16 divisors (see below), whose sum is σ = 37476480000. Its totient is φ = 6239825928.

The previous prime is 18728858867. The next prime is 18728858891. The reversal of 18728858886 is 68885882781.

It is a self number, because there is not a number n which added to its sum of digits gives 18728858886.

It is a congruent 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, 768766 + ... + 792753.

It is an arithmetic number, because the mean of its divisors is an integer number (2342280000).

Almost surely, 2^18728858886 is an apocalyptic number.

18728858886 is an abundant number, since it is smaller than the sum of its proper divisors (18747621114).

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

18728858886 is a wasteful number, since it uses less digits than its factorization.

18728858886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563523.

The product of its digits is 110100480, while the sum is 69.

The spelling of 18728858886 in words is "eighteen billion, seven hundred twenty-eight million, eight hundred fifty-eight thousand, eight hundred eighty-six".