13216371988 has 12 divisors (see below), whose sum is σ = 23620750272. Its totient is φ = 6467586200.

The previous prime is 13216371919. The next prime is 13216371997. The reversal of 13216371988 is 88917361231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35149738 + ... + 35150113.

It is an arithmetic number, because the mean of its divisors is an integer number (1968395856).

Almost surely, 2^13216371988 is an apocalyptic number.

It is an amenable number.

13216371988 is a deficient number, since it is larger than the sum of its proper divisors (10404378284).

13216371988 is a wasteful number, since it uses less digits than its factorization.

13216371988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70299902 (or 70299900 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The spelling of 13216371988 in words is "thirteen billion, two hundred sixteen million, three hundred seventy-one thousand, nine hundred eighty-eight".