18236268 has 18 divisors (see below), whose sum is σ = 46097324. Its totient is φ = 6078744.

The previous prime is 18236243. The next prime is 18236269. The reversal of 18236268 is 86263281.

18236268 is a `hidden beast` number, since 1 + 8 + 23 + 626 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×18236268² = 665122941135648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 506563 = 18236268 / (1 + 8 + 2 + 3 + 6 + 2 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (18236269) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 253246 + ... + 253317.

Almost surely, 2^18236268 is an apocalyptic number.

18236268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18236268 is an abundant number, since it is smaller than the sum of its proper divisors (27861056).

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

18236268 is a wasteful number, since it uses less digits than its factorization.

18236268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506573 (or 506568 counting only the distinct ones).

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

The square root of 18236268 is about 4270.3943611802. The cubic root of 18236268 is about 263.2158203798.

The spelling of 18236268 in words is "eighteen million, two hundred thirty-six thousand, two hundred sixty-eight".