16921928026 has 12 divisors (see below), whose sum is σ = 26228110986. Its totient is φ = 8188028760.

The previous prime is 16921928003. The next prime is 16921928039. The reversal of 16921928026 is 62082912961.

It can be written as a sum of positive squares in only one way, i.e., 9360756001 + 7561172025 = 96751^2 + 86955^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4400245 + ... + 4404088.

Almost surely, 2^16921928026 is an apocalyptic number.

16921928026 is a deficient number, since it is larger than the sum of its proper divisors (9306182960).

16921928026 is an equidigital number, since it uses as much as digits as its factorization.

16921928026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8804397 (or 8804366 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 16921928026 in words is "sixteen billion, nine hundred twenty-one million, nine hundred twenty-eight thousand, twenty-six".