18111226 has 8 divisors (see below), whose sum is σ = 31047840. Its totient is φ = 7761948.

The previous prime is 18111187. The next prime is 18111229. The reversal of 18111226 is 62211181.

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

It is a junction number, because it is equal to n+sod(n) for n = 18111197 and 18111206.

It is not an unprimeable number, because it can be changed into a prime (18111229) 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 3 ways as a sum of consecutive naturals, for example, 646816 + ... + 646843.

It is an arithmetic number, because the mean of its divisors is an integer number (3880980).

Almost surely, 2^18111226 is an apocalyptic number.

18111226 is a deficient number, since it is larger than the sum of its proper divisors (12936614).

18111226 is a wasteful number, since it uses less digits than its factorization.

18111226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293668.

The product of its digits is 192, while the sum is 22.

The square root of 18111226 is about 4255.7286097682. The cubic root of 18111226 is about 262.6128361463.

The spelling of 18111226 in words is "eighteen million, one hundred eleven thousand, two hundred twenty-six".