1918286040193 has 2 divisors, whose sum is σ = 1918286040194. Its totient is φ = 1918286040192.

The previous prime is 1918286040163. The next prime is 1918286040199. The reversal of 1918286040193 is 3910406828191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1910568066289 + 7717973904 = 1382233^2 + 87852^2 .

It is an emirp because it is prime and its reverse (3910406828191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1918286040193 - 2¹³ = 1918286032001 is a prime.

It is a super-2 number, since 2×1918286040193² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1918286040193.

It is not a weakly prime, because it can be changed into another prime (1918286040199) 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, 959143020096 + 959143020097.

It is an arithmetic number, because the mean of its divisors is an integer number (959143020097).

Almost surely, 2^{1918286040193} is an apocalyptic number.

It is an amenable number.

1918286040193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918286040193 is an equidigital number, since it uses as much as digits as its factorization.

1918286040193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 1918286040193 in words is "one trillion, nine hundred eighteen billion, two hundred eighty-six million, forty thousand, one hundred ninety-three".