20311020032320 has 112 divisors (see below), whose sum is σ = 49748882811408. Its totient is φ = 7892721008640.

The previous prime is 20311020032279. The next prime is 20311020032389. The reversal of 20311020032320 is 2323002011302.

It can be written as a sum of positive squares in 8 ways, for example, as 62532004096 + 20248488028224 = 250064^2 + 4499832^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6418000 + ... + 9045040.

Almost surely, 2^{20311020032320} is an apocalyptic number.

20311020032320 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 20311020032320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24874441405704).

20311020032320 is an abundant number, since it is smaller than the sum of its proper divisors (29437862779088).

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

20311020032320 is a wasteful number, since it uses less digits than its factorization.

20311020032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627748 (or 2627738 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20311020032320 its reverse (2323002011302), we get a palindrome (22634022043622).

The spelling of 20311020032320 in words is "twenty trillion, three hundred eleven billion, twenty million, thirty-two thousand, three hundred twenty".