18886666742273 has 4 divisors (see below), whose sum is σ = 20603636446128. Its totient is φ = 17169697038420.

The previous prime is 18886666742219. The next prime is 18886666742297. The reversal of 18886666742273 is 37224766668881.

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 18886666742273 - 2¹⁰ = 18886666741249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18886666742273.

It is not an unprimeable number, because it can be changed into a prime (18886666742173) 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, 858484851911 + ... + 858484851932.

It is an arithmetic number, because the mean of its divisors is an integer number (5150909111532).

Almost surely, 2^{18886666742273} is an apocalyptic number.

It is an amenable number.

18886666742273 is a deficient number, since it is larger than the sum of its proper divisors (1716969703855).

18886666742273 is a wasteful number, since it uses less digits than its factorization.

18886666742273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716969703854.

The product of its digits is 1560674304, while the sum is 74.

The spelling of 18886666742273 in words is "eighteen trillion, eight hundred eighty-six billion, six hundred sixty-six million, seven hundred forty-two thousand, two hundred seventy-three".