23313310021 has 4 divisors (see below), whose sum is σ = 23314244332. Its totient is φ = 23312375712.

The previous prime is 23313309991. The next prime is 23313310073. The reversal of 23313310021 is 12001331332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2871459396 + 20441850625 = 53586^2 + 142975^2 .

It is a cyclic number.

It is not a de Polignac number, because 23313310021 - 2¹³ = 23313301829 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 (23313310081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428670 + ... + 479983.

It is an arithmetic number, because the mean of its divisors is an integer number (5828561083).

Almost surely, 2^23313310021 is an apocalyptic number.

It is an amenable number.

23313310021 is a deficient number, since it is larger than the sum of its proper divisors (934311).

23313310021 is an equidigital number, since it uses as much as digits as its factorization.

23313310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934310.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 23313310021 its reverse (12001331332), we get a palindrome (35314641353).

The spelling of 23313310021 in words is "twenty-three billion, three hundred thirteen million, three hundred ten thousand, twenty-one".