23312011993 has 2 divisors, whose sum is σ = 23312011994. Its totient is φ = 23312011992.

The previous prime is 23312011963. The next prime is 23312012039. The reversal of 23312011993 is 39911021332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16270788249 + 7041223744 = 127557^2 + 83912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23312011993 is a prime.

It is not a weakly prime, because it can be changed into another prime (23312011903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656005996 + 11656005997.

It is an arithmetic number, because the mean of its divisors is an integer number (11656005997).

Almost surely, 2^23312011993 is an apocalyptic number.

It is an amenable number.

23312011993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23312011993 is an equidigital number, since it uses as much as digits as its factorization.

23312011993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 34.

The spelling of 23312011993 in words is "twenty-three billion, three hundred twelve million, eleven thousand, nine hundred ninety-three".