19673239668 has 24 divisors (see below), whose sum is σ = 45906567168. Its totient is φ = 6557412096.

The previous prime is 19673239667. The next prime is 19673239721. The reversal of 19673239668 is 86693237691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19673239667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350605 + ... + 402827.

It is an arithmetic number, because the mean of its divisors is an integer number (1912773632).

Almost surely, 2^19673239668 is an apocalyptic number.

It is an amenable number.

19673239668 is an abundant number, since it is smaller than the sum of its proper divisors (26233327500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19673239668 is a wasteful number, since it uses less digits than its factorization.

19673239668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83623 (or 83621 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 60.

The spelling of 19673239668 in words is "nineteen billion, six hundred seventy-three million, two hundred thirty-nine thousand, six hundred sixty-eight".