18169845 has 16 divisors (see below), whose sum is σ = 29130432. Its totient is φ = 9671040.

The previous prime is 18169829. The next prime is 18169861. The reversal of 18169845 is 54896181.

It is an interprime number because it is at equal distance from previous prime (18169829) and next prime (18169861).

It is not a de Polignac number, because 18169845 - 2⁴ = 18169829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18169797 and 18169806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9489 + ... + 11241.

It is an arithmetic number, because the mean of its divisors is an integer number (1820652).

Almost surely, 2^18169845 is an apocalyptic number.

18169845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18169845 is a deficient number, since it is larger than the sum of its proper divisors (10960587).

18169845 is a wasteful number, since it uses less digits than its factorization.

18169845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452.

The product of its digits is 69120, while the sum is 42.

The square root of 18169845 is about 4262.6101158797. The cubic root of 18169845 is about 262.8958562540.

The spelling of 18169845 in words is "eighteen million, one hundred sixty-nine thousand, eight hundred forty-five".