18227946 has 16 divisors (see below), whose sum is σ = 39770208. Its totient is φ = 5523600.

The previous prime is 18227941. The next prime is 18227947. The reversal of 18227946 is 64972281.

It is not an unprimeable number, because it can be changed into a prime (18227941) 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, 138025 + ... + 138156.

It is an arithmetic number, because the mean of its divisors is an integer number (2485638).

Almost surely, 2^18227946 is an apocalyptic number.

18227946 is an abundant number, since it is smaller than the sum of its proper divisors (21542262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18227946 is a wasteful number, since it uses less digits than its factorization.

18227946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276197.

The product of its digits is 48384, while the sum is 39.

The square root of 18227946 is about 4269.4198669140. The cubic root of 18227946 is about 263.1757753563.

The spelling of 18227946 in words is "eighteen million, two hundred twenty-seven thousand, nine hundred forty-six".