19423647968 has 24 divisors (see below), whose sum is σ = 38404443168. Its totient is φ = 9670138624.

The previous prime is 19423647917. The next prime is 19423647977. The reversal of 19423647968 is 86974632491.

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, 1295096 + ... + 1310007.

It is an arithmetic number, because the mean of its divisors is an integer number (1600185132).

Almost surely, 2^19423647968 is an apocalyptic number.

It is an amenable number.

19423647968 is a deficient number, since it is larger than the sum of its proper divisors (18980795200).

19423647968 is a wasteful number, since it uses less digits than its factorization.

19423647968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605346 (or 2605338 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 59.

The spelling of 19423647968 in words is "nineteen billion, four hundred twenty-three million, six hundred forty-seven thousand, nine hundred sixty-eight".