20199998001996 has 48 divisors (see below), whose sum is σ = 55450974912480. Its totient is φ = 6337254274560.

The previous prime is 20199998001991. The next prime is 20199998002007. The reversal of 20199998001996 is 69910089999102.

It is not an unprimeable number, because it can be changed into a prime (20199998001991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5501086945 + ... + 5501090616.

It is an arithmetic number, because the mean of its divisors is an integer number (1155228644010).

Almost surely, 2^{20199998001996} is an apocalyptic number.

It is an amenable number.

20199998001996 is an abundant number, since it is smaller than the sum of its proper divisors (35250976910484).

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

20199998001996 is a wasteful number, since it uses less digits than its factorization.

20199998001996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002177591 (or 11002177583 counting only the distinct ones).

The product of its (nonzero) digits is 51018336, while the sum is 72.

The spelling of 20199998001996 in words is "twenty trillion, one hundred ninety-nine billion, nine hundred ninety-eight million, one thousand, nine hundred ninety-six".