19428179646 has 16 divisors (see below), whose sum is σ = 38937484800. Its totient is φ = 6462538968.

The previous prime is 19428179623. The next prime is 19428179647. The reversal of 19428179646 is 64697182491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428179647) by changing a digit.

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, 3377116 + ... + 3382863.

It is an arithmetic number, because the mean of its divisors is an integer number (2433592800).

Almost surely, 2^19428179646 is an apocalyptic number.

19428179646 is an abundant number, since it is smaller than the sum of its proper divisors (19509305154).

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

19428179646 is a wasteful number, since it uses less digits than its factorization.

19428179646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760463.

The product of its digits is 5225472, while the sum is 57.

The spelling of 19428179646 in words is "nineteen billion, four hundred twenty-eight million, one hundred seventy-nine thousand, six hundred forty-six".