18163043 has 4 divisors (see below), whose sum is σ = 18232368. Its totient is φ = 18093720.

The previous prime is 18163039. The next prime is 18163063. The reversal of 18163043 is 34036181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34036181 = 89 ⋅382429.

It is a cyclic number.

It is not a de Polignac number, because 18163043 - 2² = 18163039 is a prime.

It is a super-2 number, since 2×18163043² = 659792262039698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18163003) by changing a digit.

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, 34268 + ... + 34793.

It is an arithmetic number, because the mean of its divisors is an integer number (4558092).

Almost surely, 2^18163043 is an apocalyptic number.

18163043 is a deficient number, since it is larger than the sum of its proper divisors (69325).

18163043 is an equidigital number, since it uses as much as digits as its factorization.

18163043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69324.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 18163043 is about 4261.8121732427. The cubic root of 18163043 is about 262.8630465666.

The spelling of 18163043 in words is "eighteen million, one hundred sixty-three thousand, forty-three".