2004264021 has 4 divisors (see below), whose sum is σ = 2672352032. Its totient is φ = 1336176012.

The previous prime is 2004263957. The next prime is 2004264023. The reversal of 2004264021 is 1204624002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2004264021 - 2⁶ = 2004263957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004264023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334044001 + ... + 334044006.

It is an arithmetic number, because the mean of its divisors is an integer number (668088008).

Almost surely, 2^2004264021 is an apocalyptic number.

It is an amenable number.

2004264021 is a deficient number, since it is larger than the sum of its proper divisors (668088011).

2004264021 is an equidigital number, since it uses as much as digits as its factorization.

2004264021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668088010.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2004264021 is about 44769.0073711714. The cubic root of 2004264021 is about 1260.8158026243.

Adding to 2004264021 its reverse (1204624002), we get a palindrome (3208888023).

The spelling of 2004264021 in words is "two billion, four million, two hundred sixty-four thousand, twenty-one".