23187806731 has 2 divisors, whose sum is σ = 23187806732. Its totient is φ = 23187806730.

The previous prime is 23187806713. The next prime is 23187806737. The reversal of 23187806731 is 13760878132.

Together with previous prime (23187806713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23187806731 - 2⁵ = 23187806699 is a prime.

It is a super-2 number, since 2×23187806731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23187806737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11593903365 + 11593903366.

It is an arithmetic number, because the mean of its divisors is an integer number (11593903366).

Almost surely, 2^23187806731 is an apocalyptic number.

23187806731 is a deficient number, since it is larger than the sum of its proper divisors (1).

23187806731 is an equidigital number, since it uses as much as digits as its factorization.

23187806731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 23187806731 in words is "twenty-three billion, one hundred eighty-seven million, eight hundred six thousand, seven hundred thirty-one".