18075172 has 6 divisors (see below), whose sum is σ = 31631558. Its totient is φ = 9037584.

The previous prime is 18075133. The next prime is 18075191. The reversal of 18075172 is 27157081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 46656 = 4246^2 + 216^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2259393 + ... + 2259400.

Almost surely, 2^18075172 is an apocalyptic number.

It is an amenable number.

18075172 is a deficient number, since it is larger than the sum of its proper divisors (13556386).

18075172 is a wasteful number, since it uses less digits than its factorization.

18075172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518797 (or 4518795 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 18075172 is about 4251.4905621441. The cubic root of 18075172 is about 262.4384593452.

The spelling of 18075172 in words is "eighteen million, seventy-five thousand, one hundred seventy-two".