18225633 has 4 divisors (see below), whose sum is σ = 24300848. Its totient is φ = 12150420.

The previous prime is 18225611. The next prime is 18225653. The reversal of 18225633 is 33652281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18225633 - 2¹⁷ = 18094561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18225633.

It is not an unprimeable number, because it can be changed into a prime (18225653) 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, 3037603 + ... + 3037608.

It is an arithmetic number, because the mean of its divisors is an integer number (6075212).

Almost surely, 2^18225633 is an apocalyptic number.

It is an amenable number.

18225633 is a deficient number, since it is larger than the sum of its proper divisors (6075215).

18225633 is an equidigital number, since it uses as much as digits as its factorization.

18225633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075214.

The product of its digits is 8640, while the sum is 30.

The square root of 18225633 is about 4269.1489784265. The cubic root of 18225633 is about 263.1646431582.

The spelling of 18225633 in words is "eighteen million, two hundred twenty-five thousand, six hundred thirty-three".