17938668699 has 16 divisors (see below), whose sum is σ = 30372349440. Its totient is φ = 10250667720.

The previous prime is 17938668697. The next prime is 17938668731. The reversal of 17938668699 is 99686683971.

It is not a de Polignac number, because 17938668699 - 2¹ = 17938668697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17938668697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47456607 + ... + 47456984.

It is an arithmetic number, because the mean of its divisors is an integer number (1898271840).

Almost surely, 2^17938668699 is an apocalyptic number.

17938668699 is a deficient number, since it is larger than the sum of its proper divisors (12433680741).

17938668699 is an equidigital number, since it uses as much as digits as its factorization.

17938668699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94913607 (or 94913601 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 17938668699 in words is "seventeen billion, nine hundred thirty-eight million, six hundred sixty-eight thousand, six hundred ninety-nine".