18130845 has 16 divisors (see below), whose sum is σ = 30536640. Its totient is φ = 9160704.

The previous prime is 18130817. The next prime is 18130867. The reversal of 18130845 is 54803181.

It is not a de Polignac number, because 18130845 - 2¹⁴ = 18114461 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 31524 + ... + 32093.

It is an arithmetic number, because the mean of its divisors is an integer number (1908540).

Almost surely, 2^18130845 is an apocalyptic number.

18130845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18130845 is a deficient number, since it is larger than the sum of its proper divisors (12405795).

18130845 is a wasteful number, since it uses less digits than its factorization.

18130845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63644.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18130845 is about 4258.0329965842. The cubic root of 18130845 is about 262.7076271151.

The spelling of 18130845 in words is "eighteen million, one hundred thirty thousand, eight hundred forty-five".