20104221032566 has 12 divisors (see below), whose sum is σ = 33147042116076. Its totient is φ = 9138282287420.

The previous prime is 20104221032563. The next prime is 20104221032603. The reversal of 20104221032566 is 66523012240102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104221032563) 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 5 ways as a sum of consecutive naturals, for example, 41537646520 + ... + 41537647003.

It is an arithmetic number, because the mean of its divisors is an integer number (2762253509673).

Almost surely, 2^{20104221032566} is an apocalyptic number.

20104221032566 is a deficient number, since it is larger than the sum of its proper divisors (13042821083510).

20104221032566 is a wasteful number, since it uses less digits than its factorization.

20104221032566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83075293547 (or 83075293536 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20104221032566 its reverse (66523012240102), we get a palindrome (86627233272668).

The spelling of 20104221032566 in words is "twenty trillion, one hundred four billion, two hundred twenty-one million, thirty-two thousand, five hundred sixty-six".