20011164791728 has 80 divisors (see below), whose sum is σ = 43921190649600. Its totient is φ = 8748935901440.

The previous prime is 20011164791719. The next prime is 20011164791767. The reversal of 20011164791728 is 82719746111002.

It is an unprimeable number.

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, 6111418 + ... + 8796121.

It is an arithmetic number, because the mean of its divisors is an integer number (549014883120).

Almost surely, 2^{20011164791728} is an apocalyptic number.

It is an amenable number.

20011164791728 is an abundant number, since it is smaller than the sum of its proper divisors (23910025857872).

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

20011164791728 is a wasteful number, since it uses less digits than its factorization.

20011164791728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907850 (or 14907844 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 20011164791728 in words is "twenty trillion, eleven billion, one hundred sixty-four million, seven hundred ninety-one thousand, seven hundred twenty-eight".