19463850728 has 64 divisors (see below), whose sum is σ = 42223420800. Its totient is φ = 8238827520.

The previous prime is 19463850691. The next prime is 19463850737. The reversal of 19463850728 is 82705836491.

It is a super-2 number, since 2×19463850728² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19463850728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6462743 + ... + 6465753.

It is an arithmetic number, because the mean of its divisors is an integer number (659740950).

It is a 2-persistent number, because it is pandigital, and so is 2⋅19463850728 = 38927701456, but 3⋅19463850728 = 58391552184 is not.

Almost surely, 2^19463850728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19463850728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21111710400).

19463850728 is an abundant number, since it is smaller than the sum of its proper divisors (22759570072).

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

19463850728 is a wasteful number, since it uses less digits than its factorization.

19463850728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410 (or 4406 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 19463850728 in words is "nineteen billion, four hundred sixty-three million, eight hundred fifty thousand, seven hundred twenty-eight".