20304211 has 2 divisors, whose sum is σ = 20304212. Its totient is φ = 20304210.

The previous prime is 20304209. The next prime is 20304223. The reversal of 20304211 is 11240302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20304211 - 2¹ = 20304209 is a prime.

Together with 20304209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20304191 and 20304200.

It is not a weakly prime, because it can be changed into another prime (20304281) 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, 10152105 + 10152106.

It is an arithmetic number, because the mean of its divisors is an integer number (10152106).

Almost surely, 2^20304211 is an apocalyptic number.

20304211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20304211 is an equidigital number, since it uses as much as digits as its factorization.

20304211 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 13.

The square root of 20304211 is about 4506.0194185112. The cubic root of 20304211 is about 272.8111016414.

Adding to 20304211 its reverse (11240302), we get a palindrome (31544513).

It can be divided in two parts, 2030 and 4211, that added together give a square (6241 = 79²).

The spelling of 20304211 in words is "twenty million, three hundred four thousand, two hundred eleven".