18218884573441 has 4 divisors (see below), whose sum is σ = 18222842623792. Its totient is φ = 18214926523092.

The previous prime is 18218884573427. The next prime is 18218884573447. The reversal of 18218884573441 is 14437548881281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18218884573441 - 2¹⁵ = 18218884540673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18218884573447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1979018271 + ... + 1979027476.

It is an arithmetic number, because the mean of its divisors is an integer number (4555710655948).

Almost surely, 2^{18218884573441} is an apocalyptic number.

It is an amenable number.

18218884573441 is a deficient number, since it is larger than the sum of its proper divisors (3958050351).

18218884573441 is an equidigital number, since it uses as much as digits as its factorization.

18218884573441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958050350.

The product of its digits is 55050240, while the sum is 64.

The spelling of 18218884573441 in words is "eighteen trillion, two hundred eighteen billion, eight hundred eighty-four million, five hundred seventy-three thousand, four hundred forty-one".