18943624061773 has 2 divisors, whose sum is σ = 18943624061774. Its totient is φ = 18943624061772.

The previous prime is 18943624061741. The next prime is 18943624061777. The reversal of 18943624061773 is 37716042634981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18726018605449 + 217605456324 = 4327357^2 + 466482^2 .

It is an emirp because it is prime and its reverse (37716042634981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18943624061773 - 2⁵ = 18943624061741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18943624061777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9471812030886 + 9471812030887.

It is an arithmetic number, because the mean of its divisors is an integer number (9471812030887).

Almost surely, 2^{18943624061773} is an apocalyptic number.

It is an amenable number.

18943624061773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18943624061773 is an equidigital number, since it uses as much as digits as its factorization.

18943624061773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 18943624061773 in words is "eighteen trillion, nine hundred forty-three billion, six hundred twenty-four million, sixty-one thousand, seven hundred seventy-three".