18144726 has 36 divisors (see below), whose sum is σ = 38107188. Its totient is φ = 5759568.

The previous prime is 18144701. The next prime is 18144727. The reversal of 18144726 is 62744181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144727) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 386035 + ... + 386081.

It is an arithmetic number, because the mean of its divisors is an integer number (1058533).

Almost surely, 2^18144726 is an apocalyptic number.

18144726 is an abundant number, since it is smaller than the sum of its proper divisors (19962462).

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

18144726 is an equidigital number, since it uses as much as digits as its factorization.

18144726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 89 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 18144726 is about 4259.6626626999. The cubic root of 18144726 is about 262.7746531204.

The spelling of 18144726 in words is "eighteen million, one hundred forty-four thousand, seven hundred twenty-six".