2004331021 has 16 divisors (see below), whose sum is σ = 2607556608. Its totient is φ = 1493910000.

The previous prime is 2004330983. The next prime is 2004331031. The reversal of 2004331021 is 1201334002.

It is a happy number.

It is not a de Polignac number, because 2004331021 - 2¹¹ = 2004328973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2004330986 and 2004331004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004331031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564105 + ... + 567646.

It is an arithmetic number, because the mean of its divisors is an integer number (162972288).

Almost surely, 2^2004331021 is an apocalyptic number.

It is an amenable number.

2004331021 is a deficient number, since it is larger than the sum of its proper divisors (603225587).

2004331021 is a wasteful number, since it uses less digits than its factorization.

2004331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131792.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2004331021 is about 44769.7556504388. The cubic root of 2004331021 is about 1260.8298516246.

Adding to 2004331021 its reverse (1201334002), we get a palindrome (3205665023).

The spelling of 2004331021 in words is "two billion, four million, three hundred thirty-one thousand, twenty-one".