20404443411 has 24 divisors (see below), whose sum is σ = 32181415344. Its totient is φ = 12355191360.

The previous prime is 20404443407. The next prime is 20404443419. The reversal of 20404443411 is 11434440402.

20404443411 is a `hidden beast` number, since 204 + 0 + 4 + 4 + 43 + 411 = 666.

It is not a de Polignac number, because 20404443411 - 2² = 20404443407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20404443419) 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 in 23 ways as a sum of consecutive naturals, for example, 18325 + ... + 202841.

It is an arithmetic number, because the mean of its divisors is an integer number (1340892306).

Almost surely, 2^20404443411 is an apocalyptic number.

20404443411 is a deficient number, since it is larger than the sum of its proper divisors (11776971933).

20404443411 is a wasteful number, since it uses less digits than its factorization.

20404443411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185651 (or 185648 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20404443411 its reverse (11434440402), we get a palindrome (31838883813).

The spelling of 20404443411 in words is "twenty billion, four hundred four million, four hundred forty-three thousand, four hundred eleven".