20404420411 has 2 divisors, whose sum is σ = 20404420412. Its totient is φ = 20404420410.

The previous prime is 20404420403. The next prime is 20404420507. The reversal of 20404420411 is 11402440402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20404420411 - 2³ = 20404420403 is a prime.

It is not a weakly prime, because it can be changed into another prime (20474420411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202210205 + 10202210206.

It is an arithmetic number, because the mean of its divisors is an integer number (10202210206).

Almost surely, 2^20404420411 is an apocalyptic number.

20404420411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404420411 is an equidigital number, since it uses as much as digits as its factorization.

20404420411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20404420411 its reverse (11402440402), we get a palindrome (31806860813).

The spelling of 20404420411 in words is "twenty billion, four hundred four million, four hundred twenty thousand, four hundred eleven".