18226768 has 20 divisors (see below), whose sum is σ = 40359520. Its totient is φ = 7811424.

The previous prime is 18226759. The next prime is 18226799. The reversal of 18226768 is 86762281.

It is a self number, because there is not a number n which added to its sum of digits gives 18226768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81258 + ... + 81481.

It is an arithmetic number, because the mean of its divisors is an integer number (2017976).

Almost surely, 2^18226768 is an apocalyptic number.

It is an amenable number.

18226768 is an abundant number, since it is smaller than the sum of its proper divisors (22132752).

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

18226768 is a wasteful number, since it uses less digits than its factorization.

18226768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162754 (or 162748 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 18226768 is about 4269.2819068316. The cubic root of 18226768 is about 263.1701058979.

The spelling of 18226768 in words is "eighteen million, two hundred twenty-six thousand, seven hundred sixty-eight".