18542144 has 14 divisors (see below), whose sum is σ = 36794694. Its totient is φ = 9271040.

The previous prime is 18542129. The next prime is 18542201. The reversal of 18542144 is 44124581.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 1236544 = 4160^2 + 1112^2 .

It is a super-2 number, since 2×18542144² = 687622208233472, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 144797 + ... + 144924.

Almost surely, 2^18542144 is an apocalyptic number.

It is an amenable number.

18542144 is a deficient number, since it is larger than the sum of its proper divisors (18252550).

18542144 is an equidigital number, since it uses as much as digits as its factorization.

18542144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289733 (or 289723 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 18542144 is about 4306.0589870553. The cubic root of 18542144 is about 264.6793035255.

The spelling of 18542144 in words is "eighteen million, five hundred forty-two thousand, one hundred forty-four".