18226864 has 20 divisors (see below), whose sum is σ = 35667360. Its totient is φ = 9022400.

The previous prime is 18226847. The next prime is 18226927. The reversal of 18226864 is 46862281.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4024 + ... + 7255.

It is an arithmetic number, because the mean of its divisors is an integer number (1783368).

Almost surely, 2^18226864 is an apocalyptic number.

It is an amenable number.

18226864 is a deficient number, since it is larger than the sum of its proper divisors (17440496).

18226864 is a wasteful number, since it uses less digits than its factorization.

18226864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388 (or 11382 counting only the distinct ones).

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

The square root of 18226864 is about 4269.2931499254. The cubic root of 18226864 is about 263.1705679342.

The spelling of 18226864 in words is "eighteen million, two hundred twenty-six thousand, eight hundred sixty-four".