18664226 has 16 divisors (see below), whose sum is σ = 33099840. Its totient is φ = 7722960.

The previous prime is 18664199. The next prime is 18664229. The reversal of 18664226 is 62246681.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18664229) 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, 22580 + ... + 23391.

It is an arithmetic number, because the mean of its divisors is an integer number (2068740).

Almost surely, 2^18664226 is an apocalyptic number.

18664226 is a deficient number, since it is larger than the sum of its proper divisors (14435614).

18664226 is a wasteful number, since it uses less digits than its factorization.

18664226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46009.

The product of its digits is 27648, while the sum is 35.

The square root of 18664226 is about 4320.2113374232. The cubic root of 18664226 is about 265.2589186507.

The spelling of 18664226 in words is "eighteen million, six hundred sixty-four thousand, two hundred twenty-six".