20120312102320 has 80 divisors (see below), whose sum is σ = 47144711116800. Its totient is φ = 7985352211200.

The previous prime is 20120312102269. The next prime is 20120312102327. The reversal of 20120312102320 is 2320121302102.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (20120312102327) 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, 63676081 + ... + 63991279.

It is an arithmetic number, because the mean of its divisors is an integer number (589308888960).

Almost surely, 2^{20120312102320} is an apocalyptic number.

20120312102320 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 20120312102320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23572355558400).

20120312102320 is an abundant number, since it is smaller than the sum of its proper divisors (27024399014480).

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

20120312102320 is a wasteful number, since it uses less digits than its factorization.

20120312102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321434 (or 321428 counting only the distinct ones).

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

Adding to 20120312102320 its reverse (2320121302102), we get a palindrome (22440433404422).

The spelling of 20120312102320 in words is "twenty trillion, one hundred twenty billion, three hundred twelve million, one hundred two thousand, three hundred twenty".