2021361320 has 64 divisors (see below), whose sum is σ = 4991414400. Its totient is φ = 730612480.

The previous prime is 2021361311. The next prime is 2021361323. The reversal of 2021361320 is 231631202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2021361292 and 2021361301.

It is not an unprimeable number, because it can be changed into a prime (2021361323) 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, 59726 + ... + 87234.

It is an arithmetic number, because the mean of its divisors is an integer number (77990850).

Almost surely, 2^2021361320 is an apocalyptic number.

2021361320 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 2021361320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495707200).

2021361320 is an abundant number, since it is smaller than the sum of its proper divisors (2970053080).

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

2021361320 is a wasteful number, since it uses less digits than its factorization.

2021361320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27698 (or 27694 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2021361320 is about 44959.5520440318. The cubic root of 2021361320 is about 1264.3907703961.

Adding to 2021361320 its reverse (231631202), we get a palindrome (2252992522).

The spelling of 2021361320 in words is "two billion, twenty-one million, three hundred sixty-one thousand, three hundred twenty".