20691260041 has 2 divisors, whose sum is σ = 20691260042. Its totient is φ = 20691260040.

The previous prime is 20691260027. The next prime is 20691260047. The reversal of 20691260041 is 14006219602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20654001225 + 37258816 = 143715^2 + 6104^2 .

It is a cyclic number.

It is not a de Polignac number, because 20691260041 - 2⁹ = 20691259529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20691259985 and 20691260012.

It is not a weakly prime, because it can be changed into another prime (20691260047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10345630020 + 10345630021.

It is an arithmetic number, because the mean of its divisors is an integer number (10345630021).

Almost surely, 2^20691260041 is an apocalyptic number.

It is an amenable number.

20691260041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20691260041 is an equidigital number, since it uses as much as digits as its factorization.

20691260041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 20691260041 its reverse (14006219602), we get a palindrome (34697479643).

The spelling of 20691260041 in words is "twenty billion, six hundred ninety-one million, two hundred sixty thousand, forty-one".