19988323113 has 64 divisors (see below), whose sum is σ = 30305643264. Its totient is φ = 11708928000.

The previous prime is 19988323081. The next prime is 19988323123. The reversal of 19988323113 is 31132388991.

It is not a de Polignac number, because 19988323113 - 2⁵ = 19988323081 is a prime.

It is a super-4 number, since 4×19988323113⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (19988323123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28513663 + ... + 28514363.

It is an arithmetic number, because the mean of its divisors is an integer number (473525676).

Almost surely, 2^19988323113 is an apocalyptic number.

It is an amenable number.

19988323113 is a deficient number, since it is larger than the sum of its proper divisors (10317320151).

19988323113 is a wasteful number, since it uses less digits than its factorization.

19988323113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 945 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The spelling of 19988323113 in words is "nineteen billion, nine hundred eighty-eight million, three hundred twenty-three thousand, one hundred thirteen".