18226368 has 42 divisors (see below), whose sum is σ = 52244244. Its totient is φ = 6075264.

The previous prime is 18226361. The next prime is 18226381. The reversal of 18226368 is 86362281.

18226368 is a `hidden beast` number, since 18 + 2 + 2 + 636 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18226361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15246 + ... + 16397.

Almost surely, 2^18226368 is an apocalyptic number.

18226368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18226368 is an abundant number, since it is smaller than the sum of its proper divisors (34017876).

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

18226368 is a wasteful number, since it uses less digits than its factorization.

18226368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31661 (or 31648 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18226368 is about 4269.2350602889. The cubic root of 18226368 is about 263.1681807292.

The spelling of 18226368 in words is "eighteen million, two hundred twenty-six thousand, three hundred sixty-eight".