20110424209 has 2 divisors, whose sum is σ = 20110424210. Its totient is φ = 20110424208.

The previous prime is 20110424197. The next prime is 20110424309. The reversal of 20110424209 is 90242401102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11779846225 + 8330577984 = 108535^2 + 91272^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110424209 - 2¹¹ = 20110422161 is a prime.

It is not a weakly prime, because it can be changed into another prime (20110424309) 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, 10055212104 + 10055212105.

It is an arithmetic number, because the mean of its divisors is an integer number (10055212105).

Almost surely, 2^20110424209 is an apocalyptic number.

It is an amenable number.

20110424209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110424209 is an equidigital number, since it uses as much as digits as its factorization.

20110424209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 20110424209 in words is "twenty billion, one hundred ten million, four hundred twenty-four thousand, two hundred nine".