18133936 has 20 divisors (see below), whose sum is σ = 36662832. Its totient is φ = 8672576.

The previous prime is 18133933. The next prime is 18133939. The reversal of 18133936 is 63933181.

It is an interprime number because it is at equal distance from previous prime (18133933) and next prime (18133939).

It is not an unprimeable number, because it can be changed into a prime (18133933) 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 3 ways as a sum of consecutive naturals, for example, 24271 + ... + 25006.

Almost surely, 2^18133936 is an apocalyptic number.

18133936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18133936 is an abundant number, since it is smaller than the sum of its proper divisors (18528896).

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

18133936 is a wasteful number, since it uses less digits than its factorization.

18133936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49308 (or 49302 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 18133936 is about 4258.3959421360. The cubic root of 18133936 is about 262.7225553242.

It can be divided in two parts, 181 and 33936, that multiplied together give a palindrome (6142416).

The spelling of 18133936 in words is "eighteen million, one hundred thirty-three thousand, nine hundred thirty-six".