18118226 has 32 divisors (see below), whose sum is σ = 33125760. Its totient is φ = 7255296.

The previous prime is 18118223. The next prime is 18118231. The reversal of 18118226 is 62281181.

It is a super-2 number, since 2×18118226² = 656540226774152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18118223) 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 15 ways as a sum of consecutive naturals, for example, 63881 + ... + 64163.

It is an arithmetic number, because the mean of its divisors is an integer number (1035180).

Almost surely, 2^18118226 is an apocalyptic number.

18118226 is a deficient number, since it is larger than the sum of its proper divisors (15007534).

18118226 is a wasteful number, since it uses less digits than its factorization.

18118226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its digits is 1536, while the sum is 29.

The square root of 18118226 is about 4256.5509511810. The cubic root of 18118226 is about 262.6466651293.

The spelling of 18118226 in words is "eighteen million, one hundred eighteen thousand, two hundred twenty-six".