18226668 has 24 divisors (see below), whose sum is σ = 43519168. Its totient is φ = 5934096.

The previous prime is 18226661. The next prime is 18226679. The reversal of 18226668 is 86662281.

It is a super-2 number, since 2×18226668² = 664422852764448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18226661) 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, 17146 + ... + 18177.

Almost surely, 2^18226668 is an apocalyptic number.

It is an amenable number.

18226668 is an abundant number, since it is smaller than the sum of its proper divisors (25292500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18226668 is a wasteful number, since it uses less digits than its factorization.

18226668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35373 (or 35371 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 18226668 is about 4269.2701952441. The cubic root of 18226668 is about 263.1696246084.

The spelling of 18226668 in words is "eighteen million, two hundred twenty-six thousand, six hundred sixty-eight".