20099888916 has 12 divisors (see below), whose sum is σ = 46899740832. Its totient is φ = 6699962968.

The previous prime is 20099888849. The next prime is 20099888947. The reversal of 20099888916 is 61988899002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20099888916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837495360 + ... + 837495383.

It is an arithmetic number, because the mean of its divisors is an integer number (3908311736).

Almost surely, 2^20099888916 is an apocalyptic number.

It is an amenable number.

20099888916 is an abundant number, since it is smaller than the sum of its proper divisors (26799851916).

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

20099888916 is a wasteful number, since it uses less digits than its factorization.

20099888916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674990750 (or 1674990748 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 60.

The spelling of 20099888916 in words is "twenty billion, ninety-nine million, eight hundred eighty-eight thousand, nine hundred sixteen".