2021320 has 32 divisors (see below), whose sum is σ = 5198400. Its totient is φ = 692928.

The previous prime is 2021291. The next prime is 2021321. The reversal of 2021320 is 231202.

2021320 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2021297 and 2021306.

It is not an unprimeable number, because it can be changed into a prime (2021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3330 + ... + 3889.

It is an arithmetic number, because the mean of its divisors is an integer number (162450).

2^2021320 is an apocalyptic number.

2021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021320 is an abundant number, since it is smaller than the sum of its proper divisors (3177080).

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

2021320 is a wasteful number, since it uses less digits than its factorization.

2021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237 (or 7233 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2021320 is about 1421.7313388963. The cubic root of 2021320 is about 126.4382154918.

Adding to 2021320 its reverse (231202), we get a palindrome (2252522).

The spelling of 2021320 in words is "two million, twenty-one thousand, three hundred twenty".