16899621428 has 12 divisors (see below), whose sum is σ = 29605377060. Its totient is φ = 8440942272.

The previous prime is 16899621391. The next prime is 16899621439. The reversal of 16899621428 is 82412699861.

It can be written as a sum of positive squares in 2 ways, for example, as 4399934224 + 12499687204 = 66332^2 + 111802^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2212823 + ... + 2220446.

It is an arithmetic number, because the mean of its divisors is an integer number (2467114755).

Almost surely, 2^16899621428 is an apocalyptic number.

It is an amenable number.

16899621428 is a deficient number, since it is larger than the sum of its proper divisors (12705755632).

16899621428 is a wasteful number, since it uses less digits than its factorization.

16899621428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434226 (or 4434224 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 56.

The spelling of 16899621428 in words is "sixteen billion, eight hundred ninety-nine million, six hundred twenty-one thousand, four hundred twenty-eight".