19448894456 has 64 divisors (see below), whose sum is σ = 39100320000. Its totient is φ = 9042713856.

The previous prime is 19448894441. The next prime is 19448894467. The reversal of 19448894456 is 65449884491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875221 + ... + 1885563.

It is an arithmetic number, because the mean of its divisors is an integer number (610942500).

Almost surely, 2^19448894456 is an apocalyptic number.

It is an amenable number.

19448894456 is an abundant number, since it is smaller than the sum of its proper divisors (19651425544).

19448894456 is a wasteful number, since it uses less digits than its factorization.

19448894456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596 (or 10592 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 62.

The spelling of 19448894456 in words is "nineteen billion, four hundred forty-eight million, eight hundred ninety-four thousand, four hundred fifty-six".