18227512 has 32 divisors (see below), whose sum is σ = 35020800. Its totient is φ = 8892000.

The previous prime is 18227509. The next prime is 18227513. The reversal of 18227512 is 21572281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95337 + ... + 95527.

It is an arithmetic number, because the mean of its divisors is an integer number (1094400).

Almost surely, 2^18227512 is an apocalyptic number.

It is an amenable number.

18227512 is a deficient number, since it is larger than the sum of its proper divisors (16793288).

18227512 is a wasteful number, since it uses less digits than its factorization.

18227512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 423 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 18227512 is about 4269.3690400339. The cubic root of 18227512 is about 263.1736866369.

Adding to 18227512 its reverse (21572281), we get a palindrome (39799793).

The spelling of 18227512 in words is "eighteen million, two hundred twenty-seven thousand, five hundred twelve".