20113323311 has 4 divisors (see below), whose sum is σ = 20762140224. Its totient is φ = 19464506400.

The previous prime is 20113323299. The next prime is 20113323341. The reversal of 20113323311 is 11332331102.

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 20113323311 - 2¹⁰ = 20113322287 is a prime.

It is a super-2 number, since 2×20113323311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113323341) 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, 324408410 + ... + 324408471.

It is an arithmetic number, because the mean of its divisors is an integer number (5190535056).

Almost surely, 2^20113323311 is an apocalyptic number.

20113323311 is a deficient number, since it is larger than the sum of its proper divisors (648816913).

20113323311 is an equidigital number, since it uses as much as digits as its factorization.

20113323311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648816912.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20113323311 its reverse (11332331102), we get a palindrome (31445654413).

The spelling of 20113323311 in words is "twenty billion, one hundred thirteen million, three hundred twenty-three thousand, three hundred eleven".