18144642 has 16 divisors (see below), whose sum is σ = 36447840. Its totient is φ = 6021792.

The previous prime is 18144619. The next prime is 18144701. The reversal of 18144642 is 24644181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5092 + ... + 7887.

It is an arithmetic number, because the mean of its divisors is an integer number (2277990).

Almost surely, 2^18144642 is an apocalyptic number.

18144642 is an abundant number, since it is smaller than the sum of its proper divisors (18303198).

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

18144642 is a wasteful number, since it uses less digits than its factorization.

18144642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13217.

The product of its digits is 6144, while the sum is 30.

The square root of 18144642 is about 4259.6528027528. The cubic root of 18144642 is about 262.7742476196.

The spelling of 18144642 in words is "eighteen million, one hundred forty-four thousand, six hundred forty-two".