19862668672 has 64 divisors (see below), whose sum is σ = 49334250240. Its totient is φ = 7738698240.

The previous prime is 19862668643. The next prime is 19862668697. The reversal of 19862668672 is 27686626891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 19862668672.

It is a congruent number.

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, 997788 + ... + 1017499.

It is an arithmetic number, because the mean of its divisors is an integer number (770847660).

Almost surely, 2^19862668672 is an apocalyptic number.

It is an amenable number.

19862668672 is an abundant number, since it is smaller than the sum of its proper divisors (29471581568).

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

19862668672 is a wasteful number, since it uses less digits than its factorization.

19862668672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015319 (or 2015307 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The spelling of 19862668672 in words is "nineteen billion, eight hundred sixty-two million, six hundred sixty-eight thousand, six hundred seventy-two".