19364432128 has 36 divisors (see below), whose sum is σ = 38995344108. Its totient is φ = 9596518400.

The previous prime is 19364432117. The next prime is 19364432149. The reversal of 19364432128 is 82123446391.

It can be written as a sum of positive squares in 2 ways, for example, as 3094919424 + 16269512704 = 55632^2 + 127552^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305773 + ... + 363628.

It is an arithmetic number, because the mean of its divisors is an integer number (1083204003).

Almost surely, 2^19364432128 is an apocalyptic number.

It is an amenable number.

19364432128 is an abundant number, since it is smaller than the sum of its proper divisors (19630911980).

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

19364432128 is an equidigital number, since it uses as much as digits as its factorization.

19364432128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669530 (or 669516 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The spelling of 19364432128 in words is "nineteen billion, three hundred sixty-four million, four hundred thirty-two thousand, one hundred twenty-eight".