18227912 has 16 divisors (see below), whose sum is σ = 34562700. Its totient is φ = 9011200.

The previous prime is 18227887. The next prime is 18227933. The reversal of 18227912 is 21972281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17355556 + 872356 = 4166^2 + 934^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12089 + ... + 13512.

Almost surely, 2^18227912 is an apocalyptic number.

It is an amenable number.

18227912 is a deficient number, since it is larger than the sum of its proper divisors (16334788).

18227912 is a wasteful number, since it uses less digits than its factorization.

18227912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25696 (or 25692 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 18227912 is about 4269.4158851065. The cubic root of 18227912 is about 263.1756117251.

The spelling of 18227912 in words is "eighteen million, two hundred twenty-seven thousand, nine hundred twelve".