18449518 has 8 divisors (see below), whose sum is σ = 27695448. Its totient is φ = 9217704.

The previous prime is 18449507. The next prime is 18449531. The reversal of 18449518 is 81594481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 805 + ... + 6127.

It is an arithmetic number, because the mean of its divisors is an integer number (3461931).

Almost surely, 2^18449518 is an apocalyptic number.

18449518 is a deficient number, since it is larger than the sum of its proper divisors (9245930).

18449518 is a wasteful number, since it uses less digits than its factorization.

18449518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7058.

The product of its digits is 46080, while the sum is 40.

The square root of 18449518 is about 4295.2902113827. The cubic root of 18449518 is about 264.2378385433.

The spelling of 18449518 in words is "eighteen million, four hundred forty-nine thousand, five hundred eighteen".