23130199991 has 2 divisors, whose sum is σ = 23130199992. Its totient is φ = 23130199990.

The previous prime is 23130199931. The next prime is 23130200021. The reversal of 23130199991 is 19999103132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23130199991 - 2⁶ = 23130199927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23130199931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565099995 + 11565099996.

It is an arithmetic number, because the mean of its divisors is an integer number (11565099996).

Almost surely, 2^23130199991 is an apocalyptic number.

23130199991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23130199991 is an equidigital number, since it uses as much as digits as its factorization.

23130199991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 47.

The spelling of 23130199991 in words is "twenty-three billion, one hundred thirty million, one hundred ninety-nine thousand, nine hundred ninety-one".