11904683421 has 4 divisors (see below), whose sum is σ = 15872911232. Its totient is φ = 7936455612.

The previous prime is 11904683389. The next prime is 11904683447. The reversal of 11904683421 is 12438640911.

11904683421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11904683421 - 2⁵ = 11904683389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11904683421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11904683621) 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 3 ways as a sum of consecutive naturals, for example, 1984113901 + ... + 1984113906.

It is an arithmetic number, because the mean of its divisors is an integer number (3968227808).

Almost surely, 2^11904683421 is an apocalyptic number.

It is an amenable number.

11904683421 is a deficient number, since it is larger than the sum of its proper divisors (3968227811).

11904683421 is an equidigital number, since it uses as much as digits as its factorization.

11904683421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968227810.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 11904683421 in words is "eleven billion, nine hundred four million, six hundred eighty-three thousand, four hundred twenty-one".