23320312013 has 2 divisors, whose sum is σ = 23320312014. Its totient is φ = 23320312012.

The previous prime is 23320311967. The next prime is 23320312021. The reversal of 23320312013 is 31021302332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20824510249 + 2495801764 = 144307^2 + 49958^2 .

It is a cyclic number.

It is not a de Polignac number, because 23320312013 - 2¹² = 23320307917 is a prime.

It is a super-2 number, since 2×23320312013² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23320312033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660156006 + 11660156007.

It is an arithmetic number, because the mean of its divisors is an integer number (11660156007).

Almost surely, 2^23320312013 is an apocalyptic number.

It is an amenable number.

23320312013 is a deficient number, since it is larger than the sum of its proper divisors (1).

23320312013 is an equidigital number, since it uses as much as digits as its factorization.

23320312013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 23320312013 its reverse (31021302332), we get a palindrome (54341614345).

The spelling of 23320312013 in words is "twenty-three billion, three hundred twenty million, three hundred twelve thousand, thirteen".