18428972513297 has 2 divisors, whose sum is σ = 18428972513298. Its totient is φ = 18428972513296.

The previous prime is 18428972513267. The next prime is 18428972513377. The reversal of 18428972513297 is 79231527982481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10360100501521 + 8068872011776 = 3218711^2 + 2840576^2 .

It is a cyclic number.

It is not a de Polignac number, because 18428972513297 - 2⁶ = 18428972513233 is a prime.

It is not a weakly prime, because it can be changed into another prime (18428972513227) 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, 9214486256648 + 9214486256649.

It is an arithmetic number, because the mean of its divisors is an integer number (9214486256649).

Almost surely, 2^{18428972513297} is an apocalyptic number.

It is an amenable number.

18428972513297 is a deficient number, since it is larger than the sum of its proper divisors (1).

18428972513297 is an equidigital number, since it uses as much as digits as its factorization.

18428972513297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 68.

The spelling of 18428972513297 in words is "eighteen trillion, four hundred twenty-eight billion, nine hundred seventy-two million, five hundred thirteen thousand, two hundred ninety-seven".