20404133311 has 4 divisors (see below), whose sum is σ = 20405311992. Its totient is φ = 20402954632.

The previous prime is 20404133303. The next prime is 20404133327. The reversal of 20404133311 is 11333140402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20404133311 - 2³ = 20404133303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404133111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562981 + ... + 598126.

It is an arithmetic number, because the mean of its divisors is an integer number (5101327998).

Almost surely, 2^20404133311 is an apocalyptic number.

20404133311 is a deficient number, since it is larger than the sum of its proper divisors (1178681).

20404133311 is a wasteful number, since it uses less digits than its factorization.

20404133311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178680.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20404133311 its reverse (11333140402), we get a palindrome (31737273713).

The spelling of 20404133311 in words is "twenty billion, four hundred four million, one hundred thirty-three thousand, three hundred eleven".