18263448128 has 56 divisors (see below), whose sum is σ = 39379672320. Its totient is φ = 8372021760.

The previous prime is 18263448101. The next prime is 18263448157. The reversal of 18263448128 is 82184436281.

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, 204551 + ... + 279942.

Almost surely, 2^18263448128 is an apocalyptic number.

It is an amenable number.

18263448128 is an abundant number, since it is smaller than the sum of its proper divisors (21116224192).

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

18263448128 is a wasteful number, since it uses less digits than its factorization.

18263448128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484555 (or 484545 counting only the distinct ones).

The product of its digits is 589824, while the sum is 47.

The spelling of 18263448128 in words is "eighteen billion, two hundred sixty-three million, four hundred forty-eight thousand, one hundred twenty-eight".