2021344520 has 64 divisors (see below), whose sum is σ = 4903295040. Its totient is φ = 745516800.

The previous prime is 2021344519. The next prime is 2021344531. The reversal of 2021344520 is 254431202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 669815 + ... + 672825.

It is an arithmetic number, because the mean of its divisors is an integer number (76613985).

Almost surely, 2^2021344520 is an apocalyptic number.

2021344520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021344520 is an abundant number, since it is smaller than the sum of its proper divisors (2881950520).

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

2021344520 is a wasteful number, since it uses less digits than its factorization.

2021344520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326 (or 4322 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2021344520 is about 44959.3652090418. The cubic root of 2021344520 is about 1264.3872675053.

Adding to 2021344520 its reverse (254431202), we get a palindrome (2275775722).

The spelling of 2021344520 in words is "two billion, twenty-one million, three hundred forty-four thousand, five hundred twenty".