20113133311 has 4 divisors (see below), whose sum is σ = 20987617392. Its totient is φ = 19238649232.

The previous prime is 20113133303. The next prime is 20113133323. The reversal of 20113133311 is 11333131102.

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 20113133311 - 2³ = 20113133303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113133351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437242006 + ... + 437242051.

It is an arithmetic number, because the mean of its divisors is an integer number (5246904348).

Almost surely, 2^20113133311 is an apocalyptic number.

20113133311 is a deficient number, since it is larger than the sum of its proper divisors (874484081).

20113133311 is an equidigital number, since it uses as much as digits as its factorization.

20113133311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874484080.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 20113133311 its reverse (11333131102), we get a palindrome (31446264413).

The spelling of 20113133311 in words is "twenty billion, one hundred thirteen million, one hundred thirty-three thousand, three hundred eleven".