20198866692 has 72 divisors (see below), whose sum is σ = 49105380576. Its totient is φ = 6460860672.

The previous prime is 20198866673. The next prime is 20198866697. The reversal of 20198866692 is 29666889102.

It is not an unprimeable number, because it can be changed into a prime (20198866697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1190823 + ... + 1207665.

Almost surely, 2^20198866692 is an apocalyptic number.

It is an amenable number.

20198866692 is an abundant number, since it is smaller than the sum of its proper divisors (28906513884).

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

20198866692 is a wasteful number, since it uses less digits than its factorization.

20198866692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16997 (or 16958 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 20198866692 in words is "twenty billion, one hundred ninety-eight million, eight hundred sixty-six thousand, six hundred ninety-two".