18825223 has 4 divisors (see below), whose sum is σ = 18867600. Its totient is φ = 18782848.

The previous prime is 18825221. The next prime is 18825227. The reversal of 18825223 is 32252881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18825223 - 2¹ = 18825221 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 (18825221) 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, 20515 + ... + 21412.

It is an arithmetic number, because the mean of its divisors is an integer number (4716900).

Almost surely, 2^18825223 is an apocalyptic number.

18825223 is a deficient number, since it is larger than the sum of its proper divisors (42377).

18825223 is an equidigital number, since it uses as much as digits as its factorization.

18825223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42376.

The product of its digits is 7680, while the sum is 31.

The square root of 18825223 is about 4338.8043283836. The cubic root of 18825223 is about 266.0194409821.

The spelling of 18825223 in words is "eighteen million, eight hundred twenty-five thousand, two hundred twenty-three".