20508041 has 2 divisors, whose sum is σ = 20508042. Its totient is φ = 20508040.

The previous prime is 20507999. The next prime is 20508043. The reversal of 20508041 is 14080502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17935225 + 2572816 = 4235^2 + 1604^2 .

It is a cyclic number.

It is not a de Polignac number, because 20508041 - 2¹⁰ = 20507017 is a prime.

Together with 20508043, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20508043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10254020 + 10254021.

It is an arithmetic number, because the mean of its divisors is an integer number (10254021).

Almost surely, 2^20508041 is an apocalyptic number.

It is an amenable number.

20508041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20508041 is an equidigital number, since it uses as much as digits as its factorization.

20508041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20508041 is about 4528.5804619108. The cubic root of 20508041 is about 273.7209628438.

Adding to 20508041 its reverse (14080502), we get a palindrome (34588543).

The spelling of 20508041 in words is "twenty million, five hundred eight thousand, forty-one".