18427538294857 has 2 divisors, whose sum is σ = 18427538294858. Its totient is φ = 18427538294856.

The previous prime is 18427538294839. The next prime is 18427538294917. The reversal of 18427538294857 is 75849283572481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17315011199161 + 1112527095696 = 4161131^2 + 1054764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18427538294857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18427538294857.

It is not a weakly prime, because it can be changed into another prime (18427538295857) 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, 9213769147428 + 9213769147429.

It is an arithmetic number, because the mean of its divisors is an integer number (9213769147429).

Almost surely, 2^{18427538294857} is an apocalyptic number.

It is an amenable number.

18427538294857 is a deficient number, since it is larger than the sum of its proper divisors (1).

18427538294857 is an equidigital number, since it uses as much as digits as its factorization.

18427538294857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1083801600, while the sum is 73.

The spelling of 18427538294857 in words is "eighteen trillion, four hundred twenty-seven billion, five hundred thirty-eight million, two hundred ninety-four thousand, eight hundred fifty-seven".