18227965 has 16 divisors (see below), whose sum is σ = 25171200. Its totient is φ = 12412800.

The previous prime is 18227947. The next prime is 18227977. The reversal of 18227965 is 56972281.

It is not a de Polignac number, because 18227965 - 2⁵ = 18227933 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3561 + ... + 7009.

It is an arithmetic number, because the mean of its divisors is an integer number (1573200).

Almost surely, 2^18227965 is an apocalyptic number.

It is an amenable number.

18227965 is a deficient number, since it is larger than the sum of its proper divisors (6943235).

18227965 is a wasteful number, since it uses less digits than its factorization.

18227965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612.

The product of its digits is 60480, while the sum is 40.

The square root of 18227965 is about 4269.4220920401. The cubic root of 18227965 is about 263.1758667972.

The spelling of 18227965 in words is "eighteen million, two hundred twenty-seven thousand, nine hundred sixty-five".