20312313012220 has 48 divisors (see below), whose sum is σ = 44323454601216. Its totient is φ = 7810759080000.

The previous prime is 20312313012197. The next prime is 20312313012227. The reversal of 20312313012220 is 2221031321302.

It is a junction number, because it is equal to n+sod(n) for n = 20312313012191 and 20312313012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312313012227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108389146 + ... + 108576385.

It is an arithmetic number, because the mean of its divisors is an integer number (923405304192).

Almost surely, 2^{20312313012220} is an apocalyptic number.

20312313012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312313012220 is an abundant number, since it is smaller than the sum of its proper divisors (24011141588996).

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

20312313012220 is a wasteful number, since it uses less digits than its factorization.

20312313012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216965722 (or 216965720 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20312313012220 its reverse (2221031321302), we get a palindrome (22533344333522).

The spelling of 20312313012220 in words is "twenty trillion, three hundred twelve billion, three hundred thirteen million, twelve thousand, two hundred twenty".