2021002444 has 24 divisors (see below), whose sum is σ = 3634219008. Its totient is φ = 982918800.

The previous prime is 2021002429. The next prime is 2021002447. The reversal of 2021002444 is 4442001202.

It is not an unprimeable number, because it can be changed into a prime (2021002447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2332 + ... + 63619.

It is an arithmetic number, because the mean of its divisors is an integer number (151425792).

Almost surely, 2^2021002444 is an apocalyptic number.

It is an amenable number.

2021002444 is a deficient number, since it is larger than the sum of its proper divisors (1613216564).

2021002444 is a wasteful number, since it uses less digits than its factorization.

2021002444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66165 (or 66163 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2021002444 is about 44955.5607683855. The cubic root of 2021002444 is about 1264.3159385894.

Adding to 2021002444 its reverse (4442001202), we get a palindrome (6463003646).

The spelling of 2021002444 in words is "two billion, twenty-one million, two thousand, four hundred forty-four".