18990710323163 has 2 divisors, whose sum is σ = 18990710323164. Its totient is φ = 18990710323162.

The previous prime is 18990710323157. The next prime is 18990710323223. The reversal of 18990710323163 is 36132301709981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18990710323163 - 2⁶ = 18990710323099 is a prime.

It is not a weakly prime, because it can be changed into another prime (18990710323133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9495355161581 + 9495355161582.

It is an arithmetic number, because the mean of its divisors is an integer number (9495355161582).

Almost surely, 2^{18990710323163} is an apocalyptic number.

18990710323163 is a deficient number, since it is larger than the sum of its proper divisors (1).

18990710323163 is an equidigital number, since it uses as much as digits as its factorization.

18990710323163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 18990710323163 in words is "eighteen trillion, nine hundred ninety billion, seven hundred ten million, three hundred twenty-three thousand, one hundred sixty-three".