18386770547273 has 2 divisors, whose sum is σ = 18386770547274. Its totient is φ = 18386770547272.

The previous prime is 18386770547231. The next prime is 18386770547297. The reversal of 18386770547273 is 37274507768381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16858513351744 + 1528257195529 = 4105912^2 + 1236227^2 .

It is a cyclic number.

It is not a de Polignac number, because 18386770547273 - 2³⁸ = 18111892640329 is a prime.

It is not a weakly prime, because it can be changed into another prime (18386770547473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9193385273636 + 9193385273637.

It is an arithmetic number, because the mean of its divisors is an integer number (9193385273637).

Almost surely, 2^{18386770547273} is an apocalyptic number.

It is an amenable number.

18386770547273 is a deficient number, since it is larger than the sum of its proper divisors (1).

18386770547273 is an equidigital number, since it uses as much as digits as its factorization.

18386770547273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331914240, while the sum is 68.

The spelling of 18386770547273 in words is "eighteen trillion, three hundred eighty-six billion, seven hundred seventy million, five hundred forty-seven thousand, two hundred seventy-three".