18169144 has 16 divisors (see below), whose sum is σ = 38934000. Its totient is φ = 7786752.

The previous prime is 18169133. The next prime is 18169147. The reversal of 18169144 is 44196181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18169147) 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, 162169 + ... + 162280.

It is an arithmetic number, because the mean of its divisors is an integer number (2433375).

Almost surely, 2^18169144 is an apocalyptic number.

18169144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18169144 is an abundant number, since it is smaller than the sum of its proper divisors (20764856).

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

18169144 is a wasteful number, since it uses less digits than its factorization.

18169144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324462 (or 324458 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 18169144 is about 4262.5278884718. The cubic root of 18169144 is about 262.8924753342.

The spelling of 18169144 in words is "eighteen million, one hundred sixty-nine thousand, one hundred forty-four".