18885538368717 has 12 divisors (see below), whose sum is σ = 25237688271264. Its totient is φ = 12561937846120.

The previous prime is 18885538368661. The next prime is 18885538368731. The reversal of 18885538368717 is 71786383558881.

It is not a de Polignac number, because 18885538368717 - 2⁸ = 18885538368461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18885538368017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15450009 + ... + 16627502.

It is an arithmetic number, because the mean of its divisors is an integer number (2103140689272).

Almost surely, 2^{18885538368717} is an apocalyptic number.

It is an amenable number.

18885538368717 is a deficient number, since it is larger than the sum of its proper divisors (6352149902547).

18885538368717 is an frugal number, since it uses more digits than its factorization.

18885538368717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32078400 (or 32077957 counting only the distinct ones).

The product of its digits is 2167603200, while the sum is 78.

The spelling of 18885538368717 in words is "eighteen trillion, eight hundred eighty-five billion, five hundred thirty-eight million, three hundred sixty-eight thousand, seven hundred seventeen".