23321030021 has 24 divisors (see below), whose sum is σ = 26013104640. Its totient is φ = 20842520160.

The previous prime is 23321030009. The next prime is 23321030071. The reversal of 23321030021 is 12003012332.

It is a de Polignac number, because none of the positive numbers 2^k-23321030021 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 (23321030071) 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 23 ways as a sum of consecutive naturals, for example, 622796 + ... + 659178.

It is an arithmetic number, because the mean of its divisors is an integer number (1083879360).

Almost surely, 2^23321030021 is an apocalyptic number.

It is an amenable number.

23321030021 is a deficient number, since it is larger than the sum of its proper divisors (2692074619).

23321030021 is a wasteful number, since it uses less digits than its factorization.

23321030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36497 (or 36466 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 23321030021 its reverse (12003012332), we get a palindrome (35324042353).

The spelling of 23321030021 in words is "twenty-three billion, three hundred twenty-one million, thirty thousand, twenty-one".