20016868386889 has 32 divisors (see below), whose sum is σ = 22231676924928. Its totient is φ = 17870036184000.

The previous prime is 20016868386887. The next prime is 20016868386919. The reversal of 20016868386889 is 98868386861002.

It is not a de Polignac number, because 20016868386889 - 2¹ = 20016868386887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20016868386887) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 282517102 + ... + 282587944.

It is an arithmetic number, because the mean of its divisors is an integer number (694739903904).

Almost surely, 2^{20016868386889} is an apocalyptic number.

It is an amenable number.

20016868386889 is a deficient number, since it is larger than the sum of its proper divisors (2214808538039).

20016868386889 is a wasteful number, since it uses less digits than its factorization.

20016868386889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72349.

The product of its (nonzero) digits is 382205952, while the sum is 73.

The spelling of 20016868386889 in words is "twenty trillion, sixteen billion, eight hundred sixty-eight million, three hundred eighty-six thousand, eight hundred eighty-nine".