18170944855988 has 24 divisors (see below), whose sum is σ = 31830699305160. Its totient is φ = 9076461685760.

The previous prime is 18170944855981. The next prime is 18170944856011. The reversal of 18170944855988 is 88955844907181.

It can be written as a sum of positive squares in 4 ways, for example, as 185983462564 + 17984961393424 = 431258^2 + 4240868^2 .

It is a super-2 number, since 2×18170944855988² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18170944855981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31115228 + ... + 31693836.

It is an arithmetic number, because the mean of its divisors is an integer number (1326279137715).

Almost surely, 2^{18170944855988} is an apocalyptic number.

It is an amenable number.

18170944855988 is a deficient number, since it is larger than the sum of its proper divisors (13659754449172).

18170944855988 is a wasteful number, since it uses less digits than its factorization.

18170944855988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586387 (or 586385 counting only the distinct ones).

The product of its (nonzero) digits is 928972800, while the sum is 77.

The spelling of 18170944855988 in words is "eighteen trillion, one hundred seventy billion, nine hundred forty-four million, eight hundred fifty-five thousand, nine hundred eighty-eight".