20311122304 has 64 divisors (see below), whose sum is σ = 44179937280. Its totient is φ = 9224409600.

The previous prime is 20311122301. The next prime is 20311122343. The reversal of 20311122304 is 40322111302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311122301) 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 7 ways as a sum of consecutive naturals, for example, 1829089 + ... + 1840159.

It is an arithmetic number, because the mean of its divisors is an integer number (690311520).

Almost surely, 2^20311122304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311122304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22089968640).

20311122304 is an abundant number, since it is smaller than the sum of its proper divisors (23868814976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311122304 is a wasteful number, since it uses less digits than its factorization.

20311122304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12399 (or 12387 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20311122304 its reverse (40322111302), we get a palindrome (60633233606).

The spelling of 20311122304 in words is "twenty billion, three hundred eleven million, one hundred twenty-two thousand, three hundred four".