18012033 has 12 divisors (see below), whose sum is σ = 28018900. Its totient is φ = 11084256.

The previous prime is 18012017. The next prime is 18012041. The reversal of 18012033 is 33021081.

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 7436529 = 3252^2 + 2727^2 .

It is not a de Polignac number, because 18012033 - 2⁴ = 18012017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18011997 and 18012015.

It is not an unprimeable number, because it can be changed into a prime (18012073) 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 11 ways as a sum of consecutive naturals, for example, 76858 + ... + 77091.

Almost surely, 2^18012033 is an apocalyptic number.

18012033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18012033 is a deficient number, since it is larger than the sum of its proper divisors (10006867).

18012033 is a wasteful number, since it uses less digits than its factorization.

18012033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153968 (or 153965 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18012033 is about 4244.0585528477. The cubic root of 18012033 is about 262.1325252666.

The spelling of 18012033 in words is "eighteen million, twelve thousand, thirty-three".