23231309993 has 2 divisors, whose sum is σ = 23231309994. Its totient is φ = 23231309992.

The previous prime is 23231309987. The next prime is 23231310023. The reversal of 23231309993 is 39990313232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12442956304 + 10788353689 = 111548^2 + 103867^2 .

It is a cyclic number.

It is not a de Polignac number, because 23231309993 - 2⁶ = 23231309929 is a prime.

It is not a weakly prime, because it can be changed into another prime (23231309093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11615654996 + 11615654997.

It is an arithmetic number, because the mean of its divisors is an integer number (11615654997).

Almost surely, 2^23231309993 is an apocalyptic number.

It is an amenable number.

23231309993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23231309993 is an equidigital number, since it uses as much as digits as its factorization.

23231309993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 44.

The spelling of 23231309993 in words is "twenty-three billion, two hundred thirty-one million, three hundred nine thousand, nine hundred ninety-three".