20704243061 has 2 divisors, whose sum is σ = 20704243062. Its totient is φ = 20704243060.

The previous prime is 20704243009. The next prime is 20704243073. The reversal of 20704243061 is 16034240702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20554670161 + 149572900 = 143369^2 + 12230^2 .

It is a cyclic number.

It is not a de Polignac number, because 20704243061 - 2²⁶ = 20637134197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20704243561) 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 as a sum of consecutive naturals, namely, 10352121530 + 10352121531.

It is an arithmetic number, because the mean of its divisors is an integer number (10352121531).

Almost surely, 2^20704243061 is an apocalyptic number.

It is an amenable number.

20704243061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20704243061 is an equidigital number, since it uses as much as digits as its factorization.

20704243061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 20704243061 its reverse (16034240702), we get a palindrome (36738483763).

The spelling of 20704243061 in words is "twenty billion, seven hundred four million, two hundred forty-three thousand, sixty-one".