18849518 has 8 divisors (see below), whose sum is σ = 28296648. Its totient is φ = 9417304.

The previous prime is 18849511. The next prime is 18849527. The reversal of 18849518 is 81594881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305 + ... + 6147.

It is an arithmetic number, because the mean of its divisors is an integer number (3537081).

Almost surely, 2^18849518 is an apocalyptic number.

18849518 is a deficient number, since it is larger than the sum of its proper divisors (9447130).

18849518 is a wasteful number, since it uses less digits than its factorization.

18849518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458.

The product of its digits is 92160, while the sum is 44.

The square root of 18849518 is about 4341.6031601241. The cubic root of 18849518 is about 266.1338294287.

The spelling of 18849518 in words is "eighteen million, eight hundred forty-nine thousand, five hundred eighteen".