18774636848 has 60 divisors (see below), whose sum is σ = 40193510784. Its totient is φ = 8489078400.

The previous prime is 18774636809. The next prime is 18774636869. The reversal of 18774636848 is 84863647781.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344390 + ... + 395162.

Almost surely, 2^18774636848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18774636848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20096755392).

18774636848 is an abundant number, since it is smaller than the sum of its proper divisors (21418873936).

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

18774636848 is a wasteful number, since it uses less digits than its factorization.

18774636848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50994 (or 50977 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 62.

The spelling of 18774636848 in words is "eighteen billion, seven hundred seventy-four million, six hundred thirty-six thousand, eight hundred forty-eight".