18975418 has 16 divisors (see below), whose sum is σ = 35486784. Its totient is φ = 7392960.

The previous prime is 18975343. The next prime is 18975419. The reversal of 18975418 is 81457981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18975419) 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 in 7 ways as a sum of consecutive naturals, for example, 61455 + ... + 61762.

It is an arithmetic number, because the mean of its divisors is an integer number (2217924).

Almost surely, 2^18975418 is an apocalyptic number.

18975418 is a deficient number, since it is larger than the sum of its proper divisors (16511366).

18975418 is a wasteful number, since it uses less digits than its factorization.

18975418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123237.

The product of its digits is 80640, while the sum is 43.

The square root of 18975418 is about 4356.0782821249. The cubic root of 18975418 is about 266.7250368753.

The spelling of 18975418 in words is "eighteen million, nine hundred seventy-five thousand, four hundred eighteen".