13216920691 has 32 divisors (see below), whose sum is σ = 15547629888. Its totient is φ = 11125002240.

The previous prime is 13216920683. The next prime is 13216920697. The reversal of 13216920691 is 19602961231.

13216920691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13216920691 - 2³ = 13216920683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13216920697) 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 in 31 ways as a sum of consecutive naturals, for example, 895911 + ... + 910543.

It is an arithmetic number, because the mean of its divisors is an integer number (485863434).

Almost surely, 2^13216920691 is an apocalyptic number.

13216920691 is a deficient number, since it is larger than the sum of its proper divisors (2330709197).

13216920691 is a wasteful number, since it uses less digits than its factorization.

13216920691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14791.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 13216920691 in words is "thirteen billion, two hundred sixteen million, nine hundred twenty thousand, six hundred ninety-one".