18558045 has 32 divisors (see below), whose sum is σ = 35994240. Its totient is φ = 8997120.

The previous prime is 18558019. The next prime is 18558049. The reversal of 18558045 is 54085581.

It is not a de Polignac number, because 18558045 - 2⁹ = 18557533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18558049) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4764 + ... + 7733.

It is an arithmetic number, because the mean of its divisors is an integer number (1124820).

Almost surely, 2^18558045 is an apocalyptic number.

18558045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18558045 is a deficient number, since it is larger than the sum of its proper divisors (17436195).

18558045 is a wasteful number, since it uses less digits than its factorization.

18558045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12522 (or 12516 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 18558045 is about 4307.9049432410. The cubic root of 18558045 is about 264.7549413646.

The spelling of 18558045 in words is "eighteen million, five hundred fifty-eight thousand, forty-five".