18375229 has 4 divisors (see below), whose sum is σ = 19174176. Its totient is φ = 17576284.

The previous prime is 18375211. The next prime is 18375251. The reversal of 18375229 is 92257381.

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 a cyclic number.

It is not a de Polignac number, because 18375229 - 2⁷ = 18375101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18375209) 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, 399439 + ... + 399484.

It is an arithmetic number, because the mean of its divisors is an integer number (4793544).

Almost surely, 2^18375229 is an apocalyptic number.

It is an amenable number.

18375229 is a deficient number, since it is larger than the sum of its proper divisors (798947).

18375229 is an equidigital number, since it uses as much as digits as its factorization.

18375229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798946.

The product of its digits is 30240, while the sum is 37.

The square root of 18375229 is about 4286.6337608898. The cubic root of 18375229 is about 263.8827006063.

The spelling of 18375229 in words is "eighteen million, three hundred seventy-five thousand, two hundred twenty-nine".