18226684 has 12 divisors (see below), whose sum is σ = 36453424. Its totient is φ = 7811424.

The previous prime is 18226679. The next prime is 18226687. The reversal of 18226684 is 48662281.

18226684 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 325449 + ... + 325504.

Almost surely, 2^18226684 is an apocalyptic number.

18226684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18226684 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18226684 is a wasteful number, since it uses less digits than its factorization.

18226684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650964 (or 650962 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 18226684 is about 4269.2720691003. The cubic root of 18226684 is about 263.1697016148.

The spelling of 18226684 in words is "eighteen million, two hundred twenty-six thousand, six hundred eighty-four".