20390411 has 2 divisors, whose sum is σ = 20390412. Its totient is φ = 20390410.

The previous prime is 20390399. The next prime is 20390413. The reversal of 20390411 is 11409302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20390411 - 2¹⁰ = 20389387 is a prime.

Together with 20390413, 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 (20390413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10195205 + 10195206.

It is an arithmetic number, because the mean of its divisors is an integer number (10195206).

Almost surely, 2^20390411 is an apocalyptic number.

20390411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20390411 is an equidigital number, since it uses as much as digits as its factorization.

20390411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20390411 is about 4515.5742713414. The cubic root of 20390411 is about 273.1966229226.

Adding to 20390411 its reverse (11409302), we get a palindrome (31799713).

The spelling of 20390411 in words is "twenty million, three hundred ninety thousand, four hundred eleven".