18105163 has 4 divisors (see below), whose sum is σ = 18892368. Its totient is φ = 17317960.

The previous prime is 18105161. The next prime is 18105179. The reversal of 18105163 is 36150181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36150181 = 23 ⋅1571747.

It is a cyclic number.

It is not a de Polignac number, because 18105163 - 2¹ = 18105161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18105161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393568 + ... + 393613.

It is an arithmetic number, because the mean of its divisors is an integer number (4723092).

Almost surely, 2^18105163 is an apocalyptic number.

18105163 is a deficient number, since it is larger than the sum of its proper divisors (787205).

18105163 is an equidigital number, since it uses as much as digits as its factorization.

18105163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787204.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 18105163 is about 4255.0162161853. The cubic root of 18105163 is about 262.5835283690.

The spelling of 18105163 in words is "eighteen million, one hundred five thousand, one hundred sixty-three".