17938739108 has 6 divisors (see below), whose sum is σ = 31392793446. Its totient is φ = 8969369552.

The previous prime is 17938739083. The next prime is 17938739153. The reversal of 17938739108 is 80193783971.

It can be written as a sum of positive squares in only one way, i.e., 17676234304 + 262504804 = 132952^2 + 16202^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2242342385 + ... + 2242342392.

It is an arithmetic number, because the mean of its divisors is an integer number (5232132241).

Almost surely, 2^17938739108 is an apocalyptic number.

It is an amenable number.

17938739108 is a deficient number, since it is larger than the sum of its proper divisors (13454054338).

17938739108 is a wasteful number, since it uses less digits than its factorization.

17938739108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4484684781 (or 4484684779 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 17938739108 in words is "seventeen billion, nine hundred thirty-eight million, seven hundred thirty-nine thousand, one hundred eight".