19431486328 has 32 divisors (see below), whose sum is σ = 37305182160. Its totient is φ = 9486005760.

The previous prime is 19431486317. The next prime is 19431486341. The reversal of 19431486328 is 82368413491.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99843 + ... + 220978.

Almost surely, 2^19431486328 is an apocalyptic number.

It is an amenable number.

19431486328 is a deficient number, since it is larger than the sum of its proper divisors (17873695832).

19431486328 is a wasteful number, since it uses less digits than its factorization.

19431486328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321007 (or 321003 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The spelling of 19431486328 in words is "nineteen billion, four hundred thirty-one million, four hundred eighty-six thousand, three hundred twenty-eight".