18463586773 has 2 divisors, whose sum is σ = 18463586774. Its totient is φ = 18463586772.

The previous prime is 18463586741. The next prime is 18463586807. The reversal of 18463586773 is 37768536481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18420461284 + 43125489 = 135722^2 + 6567^2 .

It is a cyclic number.

It is not a de Polignac number, because 18463586773 - 2⁵ = 18463586741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18463586873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9231793386 + 9231793387.

It is an arithmetic number, because the mean of its divisors is an integer number (9231793387).

Almost surely, 2^18463586773 is an apocalyptic number.

It is an amenable number.

18463586773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18463586773 is an equidigital number, since it uses as much as digits as its factorization.

18463586773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 58.

The spelling of 18463586773 in words is "eighteen billion, four hundred sixty-three million, five hundred eighty-six thousand, seven hundred seventy-three".