18778671384 has 64 divisors (see below), whose sum is σ = 52405626240. Its totient is φ = 5558165760.

The previous prime is 18778671371. The next prime is 18778671407. The reversal of 18778671384 is 48317687781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815757 + ... + 838460.

It is an arithmetic number, because the mean of its divisors is an integer number (818837910).

Almost surely, 2^18778671384 is an apocalyptic number.

It is an amenable number.

18778671384 is an abundant number, since it is smaller than the sum of its proper divisors (33626954856).

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

18778671384 is a wasteful number, since it uses less digits than its factorization.

18778671384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654280 (or 1654276 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 60.

The spelling of 18778671384 in words is "eighteen billion, seven hundred seventy-eight million, six hundred seventy-one thousand, three hundred eighty-four".