20104811 has 2 divisors, whose sum is σ = 20104812. Its totient is φ = 20104810.

The previous prime is 20104787. The next prime is 20104823. The reversal of 20104811 is 11840102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20104811 - 2¹⁴ = 20088427 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20104811.

It is not a weakly prime, because it can be changed into another prime (20100811) 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, 10052405 + 10052406.

It is an arithmetic number, because the mean of its divisors is an integer number (10052406).

Almost surely, 2^20104811 is an apocalyptic number.

20104811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104811 is an equidigital number, since it uses as much as digits as its factorization.

20104811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 20104811 is about 4483.8388686482. The cubic root of 20104811 is about 271.9151038035.

Adding to 20104811 its reverse (11840102), we get a palindrome (31944913).

The spelling of 20104811 in words is "twenty million, one hundred four thousand, eight hundred eleven".