18169146 has 24 divisors (see below), whose sum is σ = 40431924. Its totient is φ = 5892480.

The previous prime is 18169133. The next prime is 18169147. The reversal of 18169146 is 64196181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15800625 + 2368521 = 3975^2 + 1539^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18169146.

It is not an unprimeable number, because it can be changed into a prime (18169147) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12975 + ... + 14306.

Almost surely, 2^18169146 is an apocalyptic number.

18169146 is an abundant number, since it is smaller than the sum of its proper divisors (22262778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18169146 is a wasteful number, since it uses less digits than its factorization.

18169146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27326 (or 27323 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 18169146 is about 4262.5281230744. The cubic root of 18169146 is about 262.8924849803.

The spelling of 18169146 in words is "eighteen million, one hundred sixty-nine thousand, one hundred forty-six".