2021244004 has 24 divisors (see below), whose sum is σ = 3834847800. Its totient is φ = 926617344.

The previous prime is 2021243981. The next prime is 2021244013. The reversal of 2021244004 is 4004421202.

It can be written as a sum of positive squares in 4 ways, for example, as 141848100 + 1879395904 = 11910^2 + 43352^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 122689 + ... + 138184.

It is an arithmetic number, because the mean of its divisors is an integer number (159785325).

Almost surely, 2^2021244004 is an apocalyptic number.

It is an amenable number.

2021244004 is a deficient number, since it is larger than the sum of its proper divisors (1813603796).

2021244004 is a wasteful number, since it uses less digits than its factorization.

2021244004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261039 (or 261037 counting only the distinct ones).

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

The square root of 2021244004 is about 44958.2473412832. The cubic root of 2021244004 is about 1264.3663089707.

Adding to 2021244004 its reverse (4004421202), we get a palindrome (6025665206).

The spelling of 2021244004 in words is "two billion, twenty-one million, two hundred forty-four thousand, four".