18685785763 has 2 divisors, whose sum is σ = 18685785764. Its totient is φ = 18685785762.

The previous prime is 18685785757. The next prime is 18685785791. The reversal of 18685785763 is 36758758681.

It is a weak prime.

It is an emirp because it is prime and its reverse (36758758681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18685785763 - 2¹³ = 18685777571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18685785695 and 18685785704.

It is not a weakly prime, because it can be changed into another prime (18685785563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9342892881 + 9342892882.

It is an arithmetic number, because the mean of its divisors is an integer number (9342892882).

Almost surely, 2^18685785763 is an apocalyptic number.

18685785763 is a deficient number, since it is larger than the sum of its proper divisors (1).

18685785763 is an equidigital number, since it uses as much as digits as its factorization.

18685785763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67737600, while the sum is 64.

The spelling of 18685785763 in words is "eighteen billion, six hundred eighty-five million, seven hundred eighty-five thousand, seven hundred sixty-three".