20500233123187 has 2 divisors, whose sum is σ = 20500233123188. Its totient is φ = 20500233123186.

The previous prime is 20500233123179. The next prime is 20500233123199. The reversal of 20500233123187 is 78132133200502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20500233123187 - 2³ = 20500233123179 is a prime.

It is not a weakly prime, because it can be changed into another prime (20500233123787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250116561593 + 10250116561594.

It is an arithmetic number, because the mean of its divisors is an integer number (10250116561594).

Almost surely, 2^{20500233123187} is an apocalyptic number.

20500233123187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500233123187 is an equidigital number, since it uses as much as digits as its factorization.

20500233123187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 20500233123187 its reverse (78132133200502), we get a palindrome (98632366323689).

The spelling of 20500233123187 in words is "twenty trillion, five hundred billion, two hundred thirty-three million, one hundred twenty-three thousand, one hundred eighty-seven".