20110311320 has 96 divisors (see below), whose sum is σ = 51340383360. Its totient is φ = 7076889600.

The previous prime is 20110311311. The next prime is 20110311329. The reversal of 20110311320 is 2311301102.

It is an interprime number because it is at equal distance from previous prime (20110311311) and next prime (20110311329).

It is a junction number, because it is equal to n+sod(n) for n = 20110311295 and 20110311304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110311329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83024 + ... + 217056.

It is an arithmetic number, because the mean of its divisors is an integer number (534795660).

Almost surely, 2^20110311320 is an apocalyptic number.

20110311320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25670191680).

20110311320 is an abundant number, since it is smaller than the sum of its proper divisors (31230072040).

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

20110311320 is a wasteful number, since it uses less digits than its factorization.

20110311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134097 (or 134082 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20110311320 its reverse (2311301102), we get a palindrome (22421612422).

The spelling of 20110311320 in words is "twenty billion, one hundred ten million, three hundred eleven thousand, three hundred twenty".