19429744456 has 32 divisors (see below), whose sum is σ = 37145381760. Its totient is φ = 9524578752.

The previous prime is 19429744447. The next prime is 19429744517. The reversal of 19429744456 is 65444792491.

It is a junction number, because it is equal to n+sod(n) for n = 19429744397 and 19429744406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587251 + ... + 619453.

It is an arithmetic number, because the mean of its divisors is an integer number (1160793180).

Almost surely, 2^19429744456 is an apocalyptic number.

It is an amenable number.

19429744456 is a deficient number, since it is larger than the sum of its proper divisors (17715637304).

19429744456 is a wasteful number, since it uses less digits than its factorization.

19429744456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33685 (or 33681 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The spelling of 19429744456 in words is "nineteen billion, four hundred twenty-nine million, seven hundred forty-four thousand, four hundred fifty-six".