18222903 has 6 divisors (see below), whose sum is σ = 26321984. Its totient is φ = 12148596.

The previous prime is 18222871. The next prime is 18222913. The reversal of 18222903 is 30922281.

It is a happy number.

It is not a de Polignac number, because 18222903 - 2⁵ = 18222871 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 (18222913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1012375 + ... + 1012392.

Almost surely, 2^18222903 is an apocalyptic number.

18222903 is a deficient number, since it is larger than the sum of its proper divisors (8099081).

18222903 is a wasteful number, since it uses less digits than its factorization.

18222903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024773 (or 2024770 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18222903 is about 4268.8292305971. The cubic root of 18222903 is about 263.1515027760.

The spelling of 18222903 in words is "eighteen million, two hundred twenty-two thousand, nine hundred three".