16333438221 has 12 divisors (see below), whose sum is σ = 23711303200. Its totient is φ = 10834239240.

The previous prime is 16333438207. The next prime is 16333438229. The reversal of 16333438221 is 12283433361.

It is not a de Polignac number, because 16333438221 - 2⁹ = 16333437709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16333438229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4558075 + ... + 4561656.

Almost surely, 2^16333438221 is an apocalyptic number.

It is an amenable number.

16333438221 is a deficient number, since it is larger than the sum of its proper divisors (7377864979).

16333438221 is a wasteful number, since it uses less digits than its factorization.

16333438221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9119936 (or 9119933 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The spelling of 16333438221 in words is "sixteen billion, three hundred thirty-three million, four hundred thirty-eight thousand, two hundred twenty-one".