20604011 has 2 divisors, whose sum is σ = 20604012. Its totient is φ = 20604010.

The previous prime is 20603993. The next prime is 20604013. The reversal of 20604011 is 11040602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20604011 is a prime.

Together with 20604013, 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 (20604013) 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, 10302005 + 10302006.

It is an arithmetic number, because the mean of its divisors is an integer number (10302006).

Almost surely, 2^20604011 is an apocalyptic number.

20604011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20604011 is an equidigital number, since it uses as much as digits as its factorization.

20604011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20604011 is about 4539.1641301015. The cubic root of 20604011 is about 274.1472692963.

Adding to 20604011 its reverse (11040602), we get a palindrome (31644613).

The spelling of 20604011 in words is "twenty million, six hundred four thousand, eleven".