18418424 has 8 divisors (see below), whose sum is σ = 34534560. Its totient is φ = 9209208.

The previous prime is 18418409. The next prime is 18418427. The reversal of 18418424 is 42481481.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418427) 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 as a sum of consecutive naturals, namely, 1151144 + ... + 1151159.

It is an arithmetic number, because the mean of its divisors is an integer number (4316820).

Almost surely, 2^18418424 is an apocalyptic number.

It is an amenable number.

18418424 is a deficient number, since it is larger than the sum of its proper divisors (16116136).

18418424 is a wasteful number, since it uses less digits than its factorization.

18418424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302309 (or 2302305 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 18418424 is about 4291.6691391579. The cubic root of 18418424 is about 264.0893101568.

The spelling of 18418424 in words is "eighteen million, four hundred eighteen thousand, four hundred twenty-four".