18209424 has 40 divisors (see below), whose sum is σ = 47219200. Its totient is φ = 6046848.

The previous prime is 18209407. The next prime is 18209437. The reversal of 18209424 is 42490281.

It is a junction number, because it is equal to n+sod(n) for n = 18209391 and 18209400.

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, 16209 + ... + 17295.

It is an arithmetic number, because the mean of its divisors is an integer number (1180480).

Almost surely, 2^18209424 is an apocalyptic number.

It is an amenable number.

18209424 is an abundant number, since it is smaller than the sum of its proper divisors (29009776).

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

18209424 is a wasteful number, since it uses less digits than its factorization.

18209424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18209424 is about 4267.2501684340. The cubic root of 18209424 is about 263.0866047003.

The spelling of 18209424 in words is "eighteen million, two hundred nine thousand, four hundred twenty-four".