19821296198 has 8 divisors (see below), whose sum is σ = 32434848360. Its totient is φ = 9009680080.

The previous prime is 19821296191. The next prime is 19821296203. The reversal of 19821296198 is 89169212891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19821296191) 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, 450483983 + ... + 450484026.

It is an arithmetic number, because the mean of its divisors is an integer number (4054356045).

Almost surely, 2^19821296198 is an apocalyptic number.

19821296198 is a deficient number, since it is larger than the sum of its proper divisors (12613552162).

19821296198 is a wasteful number, since it uses less digits than its factorization.

19821296198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900968022.

The product of its digits is 1119744, while the sum is 56.

The spelling of 19821296198 in words is "nineteen billion, eight hundred twenty-one million, two hundred ninety-six thousand, one hundred ninety-eight".