23304443821 has 4 divisors (see below), whose sum is σ = 23934293692. Its totient is φ = 22674593952.

The previous prime is 23304443803. The next prime is 23304443839. The reversal of 23304443821 is 12834440332.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23304443803) and next prime (23304443839).

It can be written as a sum of positive squares in 2 ways, for example, as 20018288196 + 3286155625 = 141486^2 + 57325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23304443821 is a prime.

It is a super-2 number, since 2×23304443821² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23304443621) 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, 314924880 + ... + 314924953.

It is an arithmetic number, because the mean of its divisors is an integer number (5983573423).

Almost surely, 2^23304443821 is an apocalyptic number.

It is an amenable number.

23304443821 is a deficient number, since it is larger than the sum of its proper divisors (629849871).

23304443821 is an equidigital number, since it uses as much as digits as its factorization.

23304443821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629849870.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 23304443821 in words is "twenty-three billion, three hundred four million, four hundred forty-three thousand, eight hundred twenty-one".