18450122382457 has 2 divisors, whose sum is σ = 18450122382458. Its totient is φ = 18450122382456.

The previous prime is 18450122382389. The next prime is 18450122382463. The reversal of 18450122382457 is 75428322105481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18411488121321 + 38634261136 = 4290861^2 + 196556^2 .

It is a cyclic number.

It is not a de Polignac number, because 18450122382457 - 2³¹ = 18447974898809 is a prime.

It is not a weakly prime, because it can be changed into another prime (18450122388457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9225061191228 + 9225061191229.

It is an arithmetic number, because the mean of its divisors is an integer number (9225061191229).

Almost surely, 2^{18450122382457} is an apocalyptic number.

It is an amenable number.

18450122382457 is a deficient number, since it is larger than the sum of its proper divisors (1).

18450122382457 is an equidigital number, since it uses as much as digits as its factorization.

18450122382457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4300800, while the sum is 52.

The spelling of 18450122382457 in words is "eighteen trillion, four hundred fifty billion, one hundred twenty-two million, three hundred eighty-two thousand, four hundred fifty-seven".