19447375056 has 20 divisors (see below), whose sum is σ = 50239052352. Its totient is φ = 6482458336.

The previous prime is 19447375033. The next prime is 19447375099. The reversal of 19447375056 is 65057374491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202576776 + ... + 202576871.

Almost surely, 2^19447375056 is an apocalyptic number.

19447375056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19447375056 is an abundant number, since it is smaller than the sum of its proper divisors (30791677296).

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

19447375056 is a wasteful number, since it uses less digits than its factorization.

19447375056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405153658 (or 405153652 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 19447375056 in words is "nineteen billion, four hundred forty-seven million, three hundred seventy-five thousand, fifty-six".