11933876721 has 16 divisors (see below), whose sum is σ = 17391585344. Its totient is φ = 7234311744.

The previous prime is 11933876707. The next prime is 11933876789. The reversal of 11933876721 is 12767833911.

It is not a de Polignac number, because 11933876721 - 2¹⁵ = 11933843953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11933876321) 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, 2280946 + ... + 2286171.

It is an arithmetic number, because the mean of its divisors is an integer number (1086974084).

Almost surely, 2^11933876721 is an apocalyptic number.

It is an amenable number.

11933876721 is a deficient number, since it is larger than the sum of its proper divisors (5457708623).

11933876721 is a wasteful number, since it uses less digits than its factorization.

11933876721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4567200.

The product of its digits is 381024, while the sum is 48.

The spelling of 11933876721 in words is "eleven billion, nine hundred thirty-three million, eight hundred seventy-six thousand, seven hundred twenty-one".