18393943273189 has 12 divisors (see below), whose sum is σ = 20289578208928. Its totient is φ = 16662679066440.

The previous prime is 18393943273109. The next prime is 18393943273229. The reversal of 18393943273189 is 98137234939381.

It is a happy number.

It is not a de Polignac number, because 18393943273189 - 2¹¹ = 18393943271141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18393943273109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268545369 + ... + 268613854.

Almost surely, 2^{18393943273189} is an apocalyptic number.

It is an amenable number.

18393943273189 is a deficient number, since it is larger than the sum of its proper divisors (1895634935739).

18393943273189 is a wasteful number, since it uses less digits than its factorization.

18393943273189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537159528 (or 537159517 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 70.

The spelling of 18393943273189 in words is "eighteen trillion, three hundred ninety-three billion, nine hundred forty-three million, two hundred seventy-three thousand, one hundred eighty-nine".