19744450047928 has 16 divisors (see below), whose sum is σ = 37024850129760. Its totient is φ = 9871156680000.

The previous prime is 19744450047823. The next prime is 19744450047943. The reversal of 19744450047928 is 82974005444791.

It is a self number, because there is not a number n which added to its sum of digits gives 19744450047928.

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, 133464448 + ... + 133612303.

It is an arithmetic number, because the mean of its divisors is an integer number (2314053133110).

Almost surely, 2^{19744450047928} is an apocalyptic number.

It is an amenable number.

19744450047928 is a deficient number, since it is larger than the sum of its proper divisors (17280400081832).

19744450047928 is a wasteful number, since it uses less digits than its factorization.

19744450047928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267085998 (or 267085994 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 19744450047928 in words is "nineteen trillion, seven hundred forty-four billion, four hundred fifty million, forty-seven thousand, nine hundred twenty-eight".