19164805688 has 16 divisors (see below), whose sum is σ = 41067440880. Its totient is φ = 8213488128.

The previous prime is 19164805679. The next prime is 19164805691. The reversal of 19164805688 is 88650846191.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 342228673 = 19164805688 / (1 + 9 + 1 + 6 + 4 + 8 + 0 + 5 + 6 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171114281 + ... + 171114392.

It is an arithmetic number, because the mean of its divisors is an integer number (2566715055).

Almost surely, 2^19164805688 is an apocalyptic number.

It is an amenable number.

19164805688 is an abundant number, since it is smaller than the sum of its proper divisors (21902635192).

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

19164805688 is a wasteful number, since it uses less digits than its factorization.

19164805688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342228686 (or 342228682 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 19164805688 in words is "nineteen billion, one hundred sixty-four million, eight hundred five thousand, six hundred eighty-eight".