18045756 has 18 divisors (see below), whose sum is σ = 45615752. Its totient is φ = 6015240.

The previous prime is 18045739. The next prime is 18045773. The reversal of 18045756 is 65754081.

18045756 is a `hidden beast` number, since 1 + 80 + 4 + 575 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (18045739) and next prime (18045773).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×18045756² = 651298619223072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 501271 = 18045756 / (1 + 8 + 0 + 4 + 5 + 7 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 18045756.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250600 + ... + 250671.

Almost surely, 2^18045756 is an apocalyptic number.

It is an amenable number.

18045756 is an abundant number, since it is smaller than the sum of its proper divisors (27569996).

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

18045756 is a wasteful number, since it uses less digits than its factorization.

18045756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501281 (or 501276 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 18045756 is about 4248.0296609134. The cubic root of 18045756 is about 262.2960156779.

The spelling of 18045756 in words is "eighteen million, forty-five thousand, seven hundred fifty-six".