18226685 has 8 divisors (see below), whose sum is σ = 22039776. Its totient is φ = 14469520.

The previous prime is 18226679. The next prime is 18226687. The reversal of 18226685 is 58662281.

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

It is not a de Polignac number, because 18226685 - 2¹⁰ = 18225661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13259 + ... + 14568.

It is an arithmetic number, because the mean of its divisors is an integer number (2754972).

Almost surely, 2^18226685 is an apocalyptic number.

It is an amenable number.

18226685 is a deficient number, since it is larger than the sum of its proper divisors (3813091).

18226685 is a wasteful number, since it uses less digits than its factorization.

18226685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27963.

The product of its digits is 46080, while the sum is 38.

The square root of 18226685 is about 4269.2721862163. The cubic root of 18226685 is about 263.1697064277.

The spelling of 18226685 in words is "eighteen million, two hundred twenty-six thousand, six hundred eighty-five".