2021244240 has 320 divisors, whose sum is σ = 6979053312. Its totient is φ = 481689600.

The previous prime is 2021244227. The next prime is 2021244241. The reversal of 2021244240 is 424421202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021244241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7192900 + ... + 7193180.

Almost surely, 2^2021244240 is an apocalyptic number.

2021244240 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 2021244240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3489526656).

2021244240 is an abundant number, since it is smaller than the sum of its proper divisors (4957809072).

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

2021244240 is a wasteful number, since it uses less digits than its factorization.

2021244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 2021244240 is about 44958.2499659406. The cubic root of 2021244240 is about 1264.3663581797.

Adding to 2021244240 its reverse (424421202), we get a palindrome (2445665442).

The spelling of 2021244240 in words is "two billion, twenty-one million, two hundred forty-four thousand, two hundred forty".