18618424 has 16 divisors (see below), whose sum is σ = 38083320. Its totient is φ = 8462880.

The previous prime is 18618409. The next prime is 18618443. The reversal of 18618424 is 42481681.

It is a self number, because there is not a number n which added to its sum of digits gives 18618424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105699 + ... + 105874.

Almost surely, 2^18618424 is an apocalyptic number.

It is an amenable number.

18618424 is an abundant number, since it is smaller than the sum of its proper divisors (19464896).

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

18618424 is a wasteful number, since it uses less digits than its factorization.

18618424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211590 (or 211586 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 18618424 is about 4314.9071832428. The cubic root of 18618424 is about 265.0417591721.

The spelling of 18618424 in words is "eighteen million, six hundred eighteen thousand, four hundred twenty-four".