4304220021 has 12 divisors (see below), whose sum is σ = 6582924972. Its totient is φ = 2700686976.

The previous prime is 4304219993. The next prime is 4304220031. The reversal of 4304220021 is 1200224034.

It can be written as a sum of positive squares in 2 ways, for example, as 1862871921 + 2441348100 = 43161^2 + 49410^2 .

It is not a de Polignac number, because 4304220021 - 2⁵ = 4304219989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4304219976 and 4304220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4304220031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14065926 + ... + 14066231.

It is an arithmetic number, because the mean of its divisors is an integer number (548577081).

Almost surely, 2^4304220021 is an apocalyptic number.

It is an amenable number.

4304220021 is a deficient number, since it is larger than the sum of its proper divisors (2278704951).

4304220021 is a wasteful number, since it uses less digits than its factorization.

4304220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28132180 (or 28132177 counting only the distinct ones).

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

The square root of 4304220021 is about 65606.5547106385. The cubic root of 4304220021 is about 1626.6651202946.

Adding to 4304220021 its reverse (1200224034), we get a palindrome (5504444055).

The spelling of 4304220021 in words is "four billion, three hundred four million, two hundred twenty thousand, twenty-one".