19018372768 has 12 divisors (see below), whose sum is σ = 37442421450. Its totient is φ = 9509186368.

The previous prime is 19018372741. The next prime is 19018372771. The reversal of 19018372768 is 86727381091.

It can be written as a sum of positive squares in only one way, i.e., 14949463824 + 4068908944 = 122268^2 + 63788^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297162043 + ... + 297162106.

Almost surely, 2^19018372768 is an apocalyptic number.

It is an amenable number.

19018372768 is a deficient number, since it is larger than the sum of its proper divisors (18424048682).

19018372768 is an equidigital number, since it uses as much as digits as its factorization.

19018372768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594324159 (or 594324151 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 19018372768 in words is "nineteen billion, eighteen million, three hundred seventy-two thousand, seven hundred sixty-eight".