16821238028 has 36 divisors (see below), whose sum is σ = 34251005880. Its totient is φ = 7207466112.

The previous prime is 16821238003. The next prime is 16821238043. The reversal of 16821238028 is 82083212861.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1314083 + ... + 1326821.

It is an arithmetic number, because the mean of its divisors is an integer number (951416830).

Almost surely, 2^16821238028 is an apocalyptic number.

It is an amenable number.

16821238028 is an abundant number, since it is smaller than the sum of its proper divisors (17429767852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16821238028 is a wasteful number, since it uses less digits than its factorization.

16821238028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19494 (or 19485 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 16821238028 in words is "sixteen billion, eight hundred twenty-one million, two hundred thirty-eight thousand, twenty-eight".