18443942 has 16 divisors (see below), whose sum is σ = 31222800. Its totient is φ = 8094240.

The previous prime is 18443933. The next prime is 18443951. The reversal of 18443942 is 24934481.

It is an interprime number because it is at equal distance from previous prime (18443933) and next prime (18443951).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13817 + ... + 15092.

It is an arithmetic number, because the mean of its divisors is an integer number (1951425).

Almost surely, 2^18443942 is an apocalyptic number.

18443942 is a deficient number, since it is larger than the sum of its proper divisors (12778858).

18443942 is a wasteful number, since it uses less digits than its factorization.

18443942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28951.

The product of its digits is 27648, while the sum is 35.

The square root of 18443942 is about 4294.6410792987. The cubic root of 18443942 is about 264.2112156500.

It can be divided in two parts, 184439 and 42, that added together give a palindrome (184481).

The spelling of 18443942 in words is "eighteen million, four hundred forty-three thousand, nine hundred forty-two".