19479807748 has 24 divisors (see below), whose sum is σ = 36104140800. Its totient is φ = 9164631168.

The previous prime is 19479807689. The next prime is 19479807793. The reversal of 19479807748 is 84770897491.

It is a self number, because there is not a number n which added to its sum of digits gives 19479807748.

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, 248373 + ... + 317251.

It is an arithmetic number, because the mean of its divisors is an integer number (1504339200).

Almost surely, 2^19479807748 is an apocalyptic number.

It is an amenable number.

19479807748 is a deficient number, since it is larger than the sum of its proper divisors (16624333052).

19479807748 is a wasteful number, since it uses less digits than its factorization.

19479807748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73059 (or 73057 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 19479807748 in words is "nineteen billion, four hundred seventy-nine million, eight hundred seven thousand, seven hundred forty-eight".