19372128668 has 12 divisors (see below), whose sum is σ = 33998365800. Its totient is φ = 9658309872.

The previous prime is 19372128667. The next prime is 19372128707. The reversal of 19372128668 is 86682127391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19372128667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6937046 + ... + 6939837.

It is an arithmetic number, because the mean of its divisors is an integer number (2833197150).

Almost surely, 2^19372128668 is an apocalyptic number.

It is an amenable number.

19372128668 is a deficient number, since it is larger than the sum of its proper divisors (14626237132).

19372128668 is a wasteful number, since it uses less digits than its factorization.

19372128668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13877236 (or 13877234 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The spelling of 19372128668 in words is "nineteen billion, three hundred seventy-two million, one hundred twenty-eight thousand, six hundred sixty-eight".