9304220021 has 4 divisors (see below), whose sum is σ = 9321230112. Its totient is φ = 9287209932.

The previous prime is 9304220011. The next prime is 9304220039. The reversal of 9304220021 is 1200224039.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1200224039 = 7 ⋅171460577.

It is a cyclic number.

It is not a de Polignac number, because 9304220021 - 2²⁶ = 9237111157 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 (9304220011) 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, 8504225 + ... + 8505318.

It is an arithmetic number, because the mean of its divisors is an integer number (2330307528).

Almost surely, 2^9304220021 is an apocalyptic number.

It is an amenable number.

9304220021 is a deficient number, since it is larger than the sum of its proper divisors (17010091).

9304220021 is a wasteful number, since it uses less digits than its factorization.

9304220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17010090.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 9304220021 is about 96458.3849180568. The cubic root of 9304220021 is about 2103.2617506040.

The spelling of 9304220021 in words is "nine billion, three hundred four million, two hundred twenty thousand, twenty-one".