17938831928 has 8 divisors (see below), whose sum is σ = 33635309880. Its totient is φ = 8969415960.

The previous prime is 17938831927. The next prime is 17938831957. The reversal of 17938831928 is 82913883971.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17938831921) 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 as a sum of consecutive naturals, namely, 1121176988 + ... + 1121177003.

It is an arithmetic number, because the mean of its divisors is an integer number (4204413735).

Almost surely, 2^17938831928 is an apocalyptic number.

It is an amenable number.

17938831928 is a deficient number, since it is larger than the sum of its proper divisors (15696477952).

17938831928 is a wasteful number, since it uses less digits than its factorization.

17938831928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242353997 (or 2242353993 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 59.

The spelling of 17938831928 in words is "seventeen billion, nine hundred thirty-eight million, eight hundred thirty-one thousand, nine hundred twenty-eight".