18414418 has 16 divisors (see below), whose sum is σ = 30559680. Its totient is φ = 8251600.

The previous prime is 18414413. The next prime is 18414433. The reversal of 18414418 is 81441481.

It is a self number, because there is not a number n which added to its sum of digits gives 18414418.

It is not an unprimeable number, because it can be changed into a prime (18414413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4333 + ... + 7456.

It is an arithmetic number, because the mean of its divisors is an integer number (1909980).

Almost surely, 2^18414418 is an apocalyptic number.

18414418 is a deficient number, since it is larger than the sum of its proper divisors (12145262).

18414418 is a wasteful number, since it uses less digits than its factorization.

18414418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11873.

The product of its digits is 4096, while the sum is 31.

The square root of 18414418 is about 4291.2023955996. The cubic root of 18414418 is about 264.0701623280.

Adding to 18414418 its reverse (81441481), we get a palindrome (99855899).

It can be divided in two parts, 1841441 and 8, that added together give a square (1841449 = 1357²).

The spelling of 18414418 in words is "eighteen million, four hundred fourteen thousand, four hundred eighteen".