18415238524804 has 81 divisors (see below), whose sum is σ = 35719155661413. Its totient is φ = 8301086851200.

The previous prime is 18415238524801. The next prime is 18415238524831. The reversal of 18415238524804 is 40842583251481.

The square root of 18415238524804 is 4291298.

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., 3942996547204 + 14472241977600 = 1985698^2 + 3804240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18415238524801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12367520092 + ... + 12367521580.

Almost surely, 2^{18415238524804} is an apocalyptic number.

18415238524804 is the 4291298-th square number.

It is an amenable number.

18415238524804 is a deficient number, since it is larger than the sum of its proper divisors (17303917136609).

18415238524804 is an equidigital number, since it uses as much as digits as its factorization.

18415238524804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 9830400, while the sum is 55.

The spelling of 18415238524804 in words is "eighteen trillion, four hundred fifteen billion, two hundred thirty-eight million, five hundred twenty-four thousand, eight hundred four".