18073633 has 4 divisors (see below), whose sum is σ = 18085140. Its totient is φ = 18062128.

The previous prime is 18073619. The next prime is 18073637. The reversal of 18073633 is 33637081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15586704 + 2486929 = 3948^2 + 1577^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18073633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18073595 and 18073604.

It is not an unprimeable number, because it can be changed into a prime (18073637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2938 + ... + 6691.

It is an arithmetic number, because the mean of its divisors is an integer number (4521285).

Almost surely, 2^18073633 is an apocalyptic number.

It is an amenable number.

18073633 is a deficient number, since it is larger than the sum of its proper divisors (11507).

18073633 is an equidigital number, since it uses as much as digits as its factorization.

18073633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11506.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 18073633 is about 4251.3095629465. The cubic root of 18073633 is about 262.4310107439.

The spelling of 18073633 in words is "eighteen million, seventy-three thousand, six hundred thirty-three".