18870313784 has 32 divisors (see below), whose sum is σ = 40445982720. Its totient is φ = 8085358176.

The previous prime is 18870313753. The next prime is 18870313823. The reversal of 18870313784 is 48731307881.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212177 + ... + 287679.

It is an arithmetic number, because the mean of its divisors is an integer number (1263936960).

Almost surely, 2^18870313784 is an apocalyptic number.

18870313784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18870313784 is an abundant number, since it is smaller than the sum of its proper divisors (21575668936).

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

18870313784 is a wasteful number, since it uses less digits than its factorization.

18870313784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79979 (or 79975 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 18870313784 in words is "eighteen billion, eight hundred seventy million, three hundred thirteen thousand, seven hundred eighty-four".