20213231311320 has 128 divisors (see below), whose sum is σ = 62663203584000. Its totient is φ = 5210701885440.

The previous prime is 20213231311277. The next prime is 20213231311363. The reversal of 20213231311320 is 2311313231202.

20213231311320 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (20213231311277) and next prime (20213231311363).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531411 + ... + 6380349.

It is an arithmetic number, because the mean of its divisors is an integer number (489556278000).

Almost surely, 2^{20213231311320} is an apocalyptic number.

20213231311320 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 20213231311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31331601792000).

20213231311320 is an abundant number, since it is smaller than the sum of its proper divisors (42449972272680).

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

20213231311320 is a wasteful number, since it uses less digits than its factorization.

20213231311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5849913 (or 5849909 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20213231311320 its reverse (2311313231202), we get a palindrome (22524544542522).

The spelling of 20213231311320 in words is "twenty trillion, two hundred thirteen billion, two hundred thirty-one million, three hundred eleven thousand, three hundred twenty".