16684321312 has 24 divisors (see below), whose sum is σ = 33148615500. Its totient is φ = 8265625344.

The previous prime is 16684321229. The next prime is 16684321327. The reversal of 16684321312 is 21312348661.

It can be written as a sum of positive squares in 2 ways, for example, as 15327430416 + 1356890896 = 123804^2 + 36836^2 .

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, 2388187 + ... + 2395162.

Almost surely, 2^16684321312 is an apocalyptic number.

It is an amenable number.

16684321312 is a deficient number, since it is larger than the sum of its proper divisors (16464294188).

16684321312 is a wasteful number, since it uses less digits than its factorization.

16684321312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783468 (or 4783460 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

Adding to 16684321312 its reverse (21312348661), we get a palindrome (37996669973).

The spelling of 16684321312 in words is "sixteen billion, six hundred eighty-four million, three hundred twenty-one thousand, three hundred twelve".