20198788195 has 8 divisors (see below), whose sum is σ = 24239552544. Its totient is φ = 16158359424.

The previous prime is 20198788193. The next prime is 20198788219. The reversal of 20198788195 is 59188789102.

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

It is a cyclic number.

It is not a de Polignac number, because 20198788195 - 2¹ = 20198788193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20198788193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76362 + ... + 215008.

It is an arithmetic number, because the mean of its divisors is an integer number (3029944068).

Almost surely, 2^20198788195 is an apocalyptic number.

20198788195 is a deficient number, since it is larger than the sum of its proper divisors (4040764349).

20198788195 is a wasteful number, since it uses less digits than its factorization.

20198788195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167789.

The product of its (nonzero) digits is 2903040, while the sum is 58.

The spelling of 20198788195 in words is "twenty billion, one hundred ninety-eight million, seven hundred eighty-eight thousand, one hundred ninety-five".