23213340445021 has 16 divisors (see below), whose sum is σ = 24858724561776. Its totient is φ = 21599536398336.

The previous prime is 23213340445007. The next prime is 23213340445067. The reversal of 23213340445021 is 12054404331232.

It can be written as a sum of positive squares in 8 ways, for example, as 624280132996 + 22589060312025 = 790114^2 + 4752795^2 .

It is not a de Polignac number, because 23213340445021 - 2⁹ = 23213340444509 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 (23213340445081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5966746 + ... + 9056971.

It is an arithmetic number, because the mean of its divisors is an integer number (1553670285111).

Almost surely, 2^{23213340445021} is an apocalyptic number.

It is an amenable number.

23213340445021 is a deficient number, since it is larger than the sum of its proper divisors (1645384116755).

23213340445021 is a wasteful number, since it uses less digits than its factorization.

23213340445021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024768.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 23213340445021 its reverse (12054404331232), we get a palindrome (35267744776253).

The spelling of 23213340445021 in words is "twenty-three trillion, two hundred thirteen billion, three hundred forty million, four hundred forty-five thousand, twenty-one".