16723430928 has 60 divisors (see below), whose sum is σ = 48416266860. Its totient is φ = 5382252288.

The previous prime is 16723430891. The next prime is 16723430947. The reversal of 16723430928 is 82903432761.

It can be written as a sum of positive squares in 2 ways, for example, as 11009885184 + 5713545744 = 104928^2 + 75588^2 .

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, 1998151 + ... + 2006502.

It is an arithmetic number, because the mean of its divisors is an integer number (806937781).

Almost surely, 2^16723430928 is an apocalyptic number.

16723430928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16723430928 is an abundant number, since it is smaller than the sum of its proper divisors (31692835932).

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

16723430928 is a wasteful number, since it uses less digits than its factorization.

16723430928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004696 (or 4004687 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 16723430928 in words is "sixteen billion, seven hundred twenty-three million, four hundred thirty thousand, nine hundred twenty-eight".