2044204021 has 2 divisors, whose sum is σ = 2044204022. Its totient is φ = 2044204020.

The previous prime is 2044203983. The next prime is 2044204069. The reversal of 2044204021 is 1204024402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1596881521 + 447322500 = 39961^2 + 21150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2044204021 - 2⁹ = 2044203509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2044204021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2044204621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022102010 + 1022102011.

It is an arithmetic number, because the mean of its divisors is an integer number (1022102011).

Almost surely, 2^2044204021 is an apocalyptic number.

It is an amenable number.

2044204021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2044204021 is an equidigital number, since it uses as much as digits as its factorization.

2044204021 is an evil number, because the sum of its binary digits is even.

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

The square root of 2044204021 is about 45212.8745049460. The cubic root of 2044204021 is about 1269.1357546200.

Adding to 2044204021 its reverse (1204024402), we get a palindrome (3248228423).

The spelling of 2044204021 in words is "two billion, forty-four million, two hundred four thousand, twenty-one".