18785782063 has 2 divisors, whose sum is σ = 18785782064. Its totient is φ = 18785782062.

The previous prime is 18785782033. The next prime is 18785782121. The reversal of 18785782063 is 36028758781.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18785782063 - 2²⁹ = 18248911151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18785781995 and 18785782013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18785782033) 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, 9392891031 + 9392891032.

It is an arithmetic number, because the mean of its divisors is an integer number (9392891032).

Almost surely, 2^18785782063 is an apocalyptic number.

18785782063 is a deficient number, since it is larger than the sum of its proper divisors (1).

18785782063 is an equidigital number, since it uses as much as digits as its factorization.

18785782063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 18785782063 in words is "eighteen billion, seven hundred eighty-five million, seven hundred eighty-two thousand, sixty-three".