18353746573 has 2 divisors, whose sum is σ = 18353746574. Its totient is φ = 18353746572.

The previous prime is 18353746531. The next prime is 18353746589. The reversal of 18353746573 is 37564735381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14303442409 + 4050304164 = 119597^2 + 63642^2 .

It is an emirp because it is prime and its reverse (37564735381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18353746573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18353746573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18353746513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9176873286 + 9176873287.

It is an arithmetic number, because the mean of its divisors is an integer number (9176873287).

Almost surely, 2^18353746573 is an apocalyptic number.

It is an amenable number.

18353746573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18353746573 is an equidigital number, since it uses as much as digits as its factorization.

18353746573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 52.

The spelling of 18353746573 in words is "eighteen billion, three hundred fifty-three million, seven hundred forty-six thousand, five hundred seventy-three".