18291368 has 16 divisors (see below), whose sum is σ = 34342080. Its totient is φ = 9133488.

The previous prime is 18291359. The next prime is 18291397. The reversal of 18291368 is 86319281.

It is a super-2 number, since 2×18291368² = 669148286622848, which contains 22 as substring.

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, 9755 + ... + 11477.

It is an arithmetic number, because the mean of its divisors is an integer number (2146380).

Almost surely, 2^18291368 is an apocalyptic number.

It is an amenable number.

18291368 is a deficient number, since it is larger than the sum of its proper divisors (16050712).

18291368 is a wasteful number, since it uses less digits than its factorization.

18291368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056 (or 3052 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 18291368 is about 4276.8408901899. The cubic root of 18291368 is about 263.4806517820.

The spelling of 18291368 in words is "eighteen million, two hundred ninety-one thousand, three hundred sixty-eight".