20198860688 has 20 divisors (see below), whose sum is σ = 39137578368. Its totient is φ = 10098840480.

The previous prime is 20198860679. The next prime is 20198860691. The reversal of 20198860688 is 88606889102.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 409145 + ... + 455847.

Almost surely, 2^20198860688 is an apocalyptic number.

It is an amenable number.

20198860688 is a deficient number, since it is larger than the sum of its proper divisors (18938717680).

20198860688 is a wasteful number, since it uses less digits than its factorization.

20198860688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73742 (or 73736 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 56.

The spelling of 20198860688 in words is "twenty billion, one hundred ninety-eight million, eight hundred sixty thousand, six hundred eighty-eight".