18925223 has 8 divisors (see below), whose sum is σ = 19143600. Its totient is φ = 18708480.

The previous prime is 18925219. The next prime is 18925229. The reversal of 18925223 is 32252981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18925223 - 2² = 18925219 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 18925223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18925229) 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 7 ways as a sum of consecutive naturals, for example, 54053 + ... + 54401.

It is an arithmetic number, because the mean of its divisors is an integer number (2392950).

Almost surely, 2^18925223 is an apocalyptic number.

18925223 is a deficient number, since it is larger than the sum of its proper divisors (218377).

18925223 is a wasteful number, since it uses less digits than its factorization.

18925223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its digits is 8640, while the sum is 32.

The square root of 18925223 is about 4350.3129772466. The cubic root of 18925223 is about 266.4896431012.

The spelling of 18925223 in words is "eighteen million, nine hundred twenty-five thousand, two hundred twenty-three".