18424039 has 12 divisors (see below), whose sum is σ = 20112184. Its totient is φ = 16861824.

The previous prime is 18424027. The next prime is 18424067. The reversal of 18424039 is 93042481.

It is not a de Polignac number, because 18424039 - 2¹⁵ = 18391271 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18424039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18424069) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9832 + ... + 11554.

Almost surely, 2^18424039 is an apocalyptic number.

18424039 is a deficient number, since it is larger than the sum of its proper divisors (1688145).

18424039 is a wasteful number, since it uses less digits than its factorization.

With its successor (18424040) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1777).

18424039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18424039 is about 4292.3232636883. The cubic root of 18424039 is about 264.1161439911.

The spelling of 18424039 in words is "eighteen million, four hundred twenty-four thousand, thirty-nine".