18327200736784 has 15 divisors (see below), whose sum is σ = 35508984605517. Its totient is φ = 9163591806336.

The previous prime is 18327200736671. The next prime is 18327200736787. The reversal of 18327200736784 is 48763700272381.

The square root of 18327200736784 is 4281028.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2859278083600 + 15467922653184 = 1690940^2 + 3932928^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18327200736787) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16588984 + ... + 17659240.

Almost surely, 2^{18327200736784} is an apocalyptic number.

18327200736784 is the 4281028-th square number.

It is an amenable number.

18327200736784 is a deficient number, since it is larger than the sum of its proper divisors (17181783868733).

18327200736784 is an frugal number, since it uses more digits than its factorization.

18327200736784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140522 (or 1070259 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 58.

The spelling of 18327200736784 in words is "eighteen trillion, three hundred twenty-seven billion, two hundred million, seven hundred thirty-six thousand, seven hundred eighty-four".