2304420021 has 6 divisors (see below), whose sum is σ = 3328606710. Its totient is φ = 1536280008.

The previous prime is 2304420007. The next prime is 2304420029. The reversal of 2304420021 is 1200244032.

It can be written as a sum of positive squares in only one way, i.e., 1617246225 + 687173796 = 40215^2 + 26214^2 .

It is not a de Polignac number, because 2304420021 - 2⁷ = 2304419893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2304419976 and 2304420003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2304420029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128023326 + ... + 128023343.

It is an arithmetic number, because the mean of its divisors is an integer number (554767785).

Almost surely, 2^2304420021 is an apocalyptic number.

It is an amenable number.

2304420021 is a deficient number, since it is larger than the sum of its proper divisors (1024186689).

2304420021 is a wasteful number, since it uses less digits than its factorization.

2304420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256046675 (or 256046672 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2304420021 is about 48004.3750193667. The cubic root of 2304420021 is about 1320.8511538702.

Adding to 2304420021 its reverse (1200244032), we get a palindrome (3504664053).

The spelling of 2304420021 in words is "two billion, three hundred four million, four hundred twenty thousand, twenty-one".