11733889921 has 16 divisors (see below), whose sum is σ = 13252909824. Its totient is φ = 10307715264.

The previous prime is 11733889879. The next prime is 11733889997. The reversal of 11733889921 is 12998833711.

It is a cyclic number.

It is not a de Polignac number, because 11733889921 - 2²⁷ = 11599672193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11733889121) 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, 40701 + ... + 158506.

It is an arithmetic number, because the mean of its divisors is an integer number (828306864).

Almost surely, 2^11733889921 is an apocalyptic number.

It is an amenable number.

11733889921 is a deficient number, since it is larger than the sum of its proper divisors (1519019903).

11733889921 is a wasteful number, since it uses less digits than its factorization.

11733889921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199440.

The product of its digits is 653184, while the sum is 52.

The spelling of 11733889921 in words is "eleven billion, seven hundred thirty-three million, eight hundred eighty-nine thousand, nine hundred twenty-one".