20312312323187 has 2 divisors, whose sum is σ = 20312312323188. Its totient is φ = 20312312323186.

The previous prime is 20312312323153. The next prime is 20312312323213. The reversal of 20312312323187 is 78132321321302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20312312323187 - 2⁶ = 20312312323123 is a prime.

It is a super-3 number, since 3×20312312323187³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20312312323187.

It is not a weakly prime, because it can be changed into another prime (20312312323487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156156161593 + 10156156161594.

It is an arithmetic number, because the mean of its divisors is an integer number (10156156161594).

Almost surely, 2^{20312312323187} is an apocalyptic number.

20312312323187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312312323187 is an equidigital number, since it uses as much as digits as its factorization.

20312312323187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

Adding to 20312312323187 its reverse (78132321321302), we get a palindrome (98444633644489).

The spelling of 20312312323187 in words is "twenty trillion, three hundred twelve billion, three hundred twelve million, three hundred twenty-three thousand, one hundred eighty-seven".