20404411 has 2 divisors, whose sum is σ = 20404412. Its totient is φ = 20404410.

The previous prime is 20404393. The next prime is 20404421. The reversal of 20404411 is 11440402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20404411 - 2⁹ = 20403899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20404421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202205 + 10202206.

It is an arithmetic number, because the mean of its divisors is an integer number (10202206).

Almost surely, 2^20404411 is an apocalyptic number.

20404411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404411 is an equidigital number, since it uses as much as digits as its factorization.

20404411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20404411 is about 4517.1241957688. The cubic root of 20404411 is about 273.2591339676.

Adding to 20404411 its reverse (11440402), we get a palindrome (31844813).

The spelling of 20404411 in words is "twenty million, four hundred four thousand, four hundred eleven".