18180745 has 16 divisors (see below), whose sum is σ = 24194880. Its totient is φ = 13003200.

The previous prime is 18180733. The next prime is 18180751. The reversal of 18180745 is 54708181.

It is not a de Polignac number, because 18180745 - 2⁵ = 18180713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18180745.

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 in 15 ways as a sum of consecutive naturals, for example, 646 + ... + 6064.

It is an arithmetic number, because the mean of its divisors is an integer number (1512180).

Almost surely, 2^18180745 is an apocalyptic number.

It is an amenable number.

18180745 is a deficient number, since it is larger than the sum of its proper divisors (6014135).

18180745 is a wasteful number, since it uses less digits than its factorization.

18180745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5496.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 18180745 is about 4263.8884835324. Note that the first 3 decimals coincide. The cubic root of 18180745 is about 262.9484157193.

The spelling of 18180745 in words is "eighteen million, one hundred eighty thousand, seven hundred forty-five".