18075645 has 24 divisors (see below), whose sum is σ = 35807616. Its totient is φ = 8263008.

The previous prime is 18075623. The next prime is 18075649. The reversal of 18075645 is 54657081.

18075645 is a `hidden beast` number, since 1 + 8 + 0 + 7 + 5 + 645 = 666.

It is not a de Polignac number, because 18075645 - 2⁹ = 18075133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18075649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28377 + ... + 29006.

It is an arithmetic number, because the mean of its divisors is an integer number (1491984).

Almost surely, 2^18075645 is an apocalyptic number.

18075645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18075645 is a deficient number, since it is larger than the sum of its proper divisors (17731971).

18075645 is a wasteful number, since it uses less digits than its factorization.

18075645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57401 (or 57398 counting only the distinct ones).

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

The square root of 18075645 is about 4251.5461893292. The cubic root of 18075645 is about 262.4407485315.

It can be divided in two parts, 180 and 75645, that multiplied together give a square (13616100 = 3690²).

The spelling of 18075645 in words is "eighteen million, seventy-five thousand, six hundred forty-five".