18749580985873 has 2 divisors, whose sum is σ = 18749580985874. Its totient is φ = 18749580985872.

The previous prime is 18749580985787. The next prime is 18749580985879. The reversal of 18749580985873 is 37858908594781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15492505346704 + 3257075639169 = 3936052^2 + 1804737^2 .

It is a cyclic number.

It is not a de Polignac number, because 18749580985873 - 2²¹ = 18749578888721 is a prime.

It is not a weakly prime, because it can be changed into another prime (18749580985879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9374790492936 + 9374790492937.

It is an arithmetic number, because the mean of its divisors is an integer number (9374790492937).

Almost surely, 2^{18749580985873} is an apocalyptic number.

It is an amenable number.

18749580985873 is a deficient number, since it is larger than the sum of its proper divisors (1).

18749580985873 is an equidigital number, since it uses as much as digits as its factorization.

18749580985873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4877107200, while the sum is 82.

The spelling of 18749580985873 in words is "eighteen trillion, seven hundred forty-nine billion, five hundred eighty million, nine hundred eighty-five thousand, eight hundred seventy-three".