20012202220985 has 16 divisors (see below), whose sum is σ = 25862304673296. Its totient is φ = 14778023467008.

The previous prime is 20012202220981. The next prime is 20012202221021. The reversal of 20012202220985 is 58902220221002.

It can be written as a sum of positive squares in 8 ways, for example, as 1400087662009 + 18612114558976 = 1183253^2 + 4314176^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012202220985 - 2² = 20012202220981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012202220981) 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, 2232257 + ... + 6708753.

It is an arithmetic number, because the mean of its divisors is an integer number (1616394042081).

Almost surely, 2^{20012202220985} is an apocalyptic number.

It is an amenable number.

20012202220985 is a deficient number, since it is larger than the sum of its proper divisors (5850102452311).

20012202220985 is a wasteful number, since it uses less digits than its factorization.

20012202220985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545292.

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 20012202220985 its reverse (58902220221002), we get a palindrome (78914422441987).

The spelling of 20012202220985 in words is "twenty trillion, twelve billion, two hundred two million, two hundred twenty thousand, nine hundred eighty-five".