23205440231993 has 2 divisors, whose sum is σ = 23205440231994. Its totient is φ = 23205440231992.

The previous prime is 23205440231989. The next prime is 23205440232011. The reversal of 23205440231993 is 39913204450232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19368554544784 + 3836885687209 = 4400972^2 + 1958797^2 .

It is a cyclic number.

It is not a de Polignac number, because 23205440231993 - 2² = 23205440231989 is a prime.

It is not a weakly prime, because it can be changed into another prime (23205440231293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602720115996 + 11602720115997.

It is an arithmetic number, because the mean of its divisors is an integer number (11602720115997).

Almost surely, 2^{23205440231993} is an apocalyptic number.

It is an amenable number.

23205440231993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23205440231993 is an equidigital number, since it uses as much as digits as its factorization.

23205440231993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 23205440231993 in words is "twenty-three trillion, two hundred five billion, four hundred forty million, two hundred thirty-one thousand, nine hundred ninety-three".