23240186758991 has 2 divisors, whose sum is σ = 23240186758992. Its totient is φ = 23240186758990.

The previous prime is 23240186758981. The next prime is 23240186758993. The reversal of 23240186758991 is 19985768104232.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23240186758991 is a prime.

Together with 23240186758993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23240186758993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11620093379495 + 11620093379496.

It is an arithmetic number, because the mean of its divisors is an integer number (11620093379496).

It is a 2-persistent number, because it is pandigital, and so is 2⋅23240186758991 = 46480373517982, but 3⋅23240186758991 = 69720560276973 is not.

Almost surely, 2^{23240186758991} is an apocalyptic number.

23240186758991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23240186758991 is an equidigital number, since it uses as much as digits as its factorization.

23240186758991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 65.

The spelling of 23240186758991 in words is "twenty-three trillion, two hundred forty billion, one hundred eighty-six million, seven hundred fifty-eight thousand, nine hundred ninety-one".