20212012320 has 192 divisors, whose sum is σ = 64900362240. Its totient is φ = 5285977088.

The previous prime is 20212012267. The next prime is 20212012321. The reversal of 20212012320 is 2321021202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20212012320.

It is not an unprimeable number, because it can be changed into a prime (20212012321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23420209 + ... + 23421071.

It is an arithmetic number, because the mean of its divisors is an integer number (338022720).

Almost surely, 2^20212012320 is an apocalyptic number.

20212012320 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 20212012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32450181120).

20212012320 is an abundant number, since it is smaller than the sum of its proper divisors (44688349920).

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

20212012320 is a wasteful number, since it uses less digits than its factorization.

20212012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20212012320 its reverse (2321021202), we get a palindrome (22533033522).

The spelling of 20212012320 in words is "twenty billion, two hundred twelve million, twelve thousand, three hundred twenty".