18945344164236 has 24 divisors (see below), whose sum is σ = 50520917771520. Its totient is φ = 5412955475472.

The previous prime is 18945344164223. The next prime is 18945344164247. The reversal of 18945344164236 is 63246144354981.

It is a super-2 number, since 2×18945344164236² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18945344164236.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112769905656 + ... + 112769905823.

It is an arithmetic number, because the mean of its divisors is an integer number (2105038240480).

Almost surely, 2^{18945344164236} is an apocalyptic number.

It is an amenable number.

18945344164236 is an abundant number, since it is smaller than the sum of its proper divisors (31575573607284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18945344164236 is a wasteful number, since it uses less digits than its factorization.

18945344164236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225539811493 (or 225539811491 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 60.

The spelling of 18945344164236 in words is "eighteen trillion, nine hundred forty-five billion, three hundred forty-four million, one hundred sixty-four thousand, two hundred thirty-six".