19193662172 has 12 divisors (see below), whose sum is σ = 34158212760. Its totient is φ = 9434172816.

The previous prime is 19193662153. The next prime is 19193662181. The reversal of 19193662172 is 27126639191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40664303 + ... + 40664774.

It is an arithmetic number, because the mean of its divisors is an integer number (2846517730).

Almost surely, 2^19193662172 is an apocalyptic number.

It is an amenable number.

19193662172 is a deficient number, since it is larger than the sum of its proper divisors (14964550588).

19193662172 is a wasteful number, since it uses less digits than its factorization.

19193662172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81329140 (or 81329138 counting only the distinct ones).

The product of its digits is 244944, while the sum is 47.

The spelling of 19193662172 in words is "nineteen billion, one hundred ninety-three million, six hundred sixty-two thousand, one hundred seventy-two".