18774643101073 has 4 divisors (see below), whose sum is σ = 18785706534180. Its totient is φ = 18763579667968.

The previous prime is 18774643101041. The next prime is 18774643101079. The reversal of 18774643101073 is 37010134647781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9092015998209 + 9682627102864 = 3015297^2 + 3111692^2 .

It is a cyclic number.

It is not a de Polignac number, because 18774643101073 - 2⁵ = 18774643101041 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 18774643101073.

It is not an unprimeable number, because it can be changed into a prime (18774643101079) 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, 5531714008 + ... + 5531717401.

It is an arithmetic number, because the mean of its divisors is an integer number (4696426633545).

Almost surely, 2^{18774643101073} is an apocalyptic number.

It is an amenable number.

18774643101073 is a deficient number, since it is larger than the sum of its proper divisors (11063433107).

18774643101073 is a wasteful number, since it uses less digits than its factorization.

18774643101073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063433106.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 18774643101073 in words is "eighteen trillion, seven hundred seventy-four billion, six hundred forty-three million, one hundred one thousand, seventy-three".