11921687196 has 12 divisors (see below), whose sum is σ = 27817270152. Its totient is φ = 3973895728.

The previous prime is 11921687179. The next prime is 11921687201. The reversal of 11921687196 is 69178612911.

It is a tau number, because it is divible by the number of its divisors (12).

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, 496736955 + ... + 496736978.

It is an arithmetic number, because the mean of its divisors is an integer number (2318105846).

Almost surely, 2^11921687196 is an apocalyptic number.

It is an amenable number.

11921687196 is an abundant number, since it is smaller than the sum of its proper divisors (15895582956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11921687196 is a wasteful number, since it uses less digits than its factorization.

11921687196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993473940 (or 993473938 counting only the distinct ones).

The product of its digits is 326592, while the sum is 51.

The spelling of 11921687196 in words is "eleven billion, nine hundred twenty-one million, six hundred eighty-seven thousand, one hundred ninety-six".