18163045 has 4 divisors (see below), whose sum is σ = 21795660. Its totient is φ = 14530432.

The previous prime is 18163039. The next prime is 18163063. The reversal of 18163045 is 54036181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54036181 = 353 ⋅153077.

It can be written as a sum of positive squares in 2 ways, for example, as 10131489 + 8031556 = 3183^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 18163045 - 2⁹ = 18162533 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816300 + ... + 1816309.

It is an arithmetic number, because the mean of its divisors is an integer number (5448915).

Almost surely, 2^18163045 is an apocalyptic number.

It is an amenable number.

18163045 is a deficient number, since it is larger than the sum of its proper divisors (3632615).

18163045 is an equidigital number, since it uses as much as digits as its factorization.

18163045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632614.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 18163045 is about 4261.8124078847. The cubic root of 18163045 is about 262.8630562149.

The spelling of 18163045 in words is "eighteen million, one hundred sixty-three thousand, forty-five".