18813785802 has 32 divisors (see below), whose sum is σ = 43012328832. Its totient is φ = 5374193664.

The previous prime is 18813785747. The next prime is 18813785813. The reversal of 18813785802 is 20858731881.

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, 155818 + ... + 248810.

It is an arithmetic number, because the mean of its divisors is an integer number (1344135276).

Almost surely, 2^18813785802 is an apocalyptic number.

18813785802 is an abundant number, since it is smaller than the sum of its proper divisors (24198543030).

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

18813785802 is a wasteful number, since it uses less digits than its factorization.

18813785802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97822.

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 18813785802 in words is "eighteen billion, eight hundred thirteen million, seven hundred eighty-five thousand, eight hundred two".