18564410536243 has 64 divisors (see below), whose sum is σ = 22328480563200. Its totient is φ = 15213030940800.

The previous prime is 18564410536223. The next prime is 18564410536361. The reversal of 18564410536243 is 34263501446581.

It is not a de Polignac number, because 18564410536243 - 2²¹ = 18564408439091 is a prime.

It is a super-2 number, since 2×18564410536243² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18564410536223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 450539080 + ... + 450580282.

It is an arithmetic number, because the mean of its divisors is an integer number (348882508800).

Almost surely, 2^{18564410536243} is an apocalyptic number.

18564410536243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18564410536243 is a deficient number, since it is larger than the sum of its proper divisors (3764070026957).

18564410536243 is a wasteful number, since it uses less digits than its factorization.

18564410536243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41720.

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 18564410536243 in words is "eighteen trillion, five hundred sixty-four billion, four hundred ten million, five hundred thirty-six thousand, two hundred forty-three".