18571193348453 has 2 divisors, whose sum is σ = 18571193348454. Its totient is φ = 18571193348452.

The previous prime is 18571193348419. The next prime is 18571193348471. The reversal of 18571193348453 is 35484339117581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14999029088164 + 3572164260289 = 3872858^2 + 1890017^2 .

It is a cyclic number.

It is not a de Polignac number, because 18571193348453 - 2²² = 18571189154149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18571193348413) 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, 9285596674226 + 9285596674227.

It is an arithmetic number, because the mean of its divisors is an integer number (9285596674227).

Almost surely, 2^{18571193348453} is an apocalyptic number.

It is an amenable number.

18571193348453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18571193348453 is an equidigital number, since it uses as much as digits as its factorization.

18571193348453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 62.

The spelling of 18571193348453 in words is "eighteen trillion, five hundred seventy-one billion, one hundred ninety-three million, three hundred forty-eight thousand, four hundred fifty-three".