18784274384 has 20 divisors (see below), whose sum is σ = 36405509184. Its totient is φ = 9389304288.

The previous prime is 18784274357. The next prime is 18784274387. The reversal of 18784274384 is 48347248781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18784274387) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 121832 + ... + 228935.

Almost surely, 2^18784274384 is an apocalyptic number.

It is an amenable number.

18784274384 is a deficient number, since it is larger than the sum of its proper divisors (17621234800).

18784274384 is a wasteful number, since it uses less digits than its factorization.

18784274384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354122 (or 354116 counting only the distinct ones).

The product of its digits is 9633792, while the sum is 56.

The spelling of 18784274384 in words is "eighteen billion, seven hundred eighty-four million, two hundred seventy-four thousand, three hundred eighty-four".