18227704 has 32 divisors (see below), whose sum is σ = 37664640. Its totient is φ = 8200800.

The previous prime is 18227701. The next prime is 18227711. The reversal of 18227704 is 40772281.

It is a super-2 number, since 2×18227704² = 664498386223232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227701) 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, 8059 + ... + 10069.

It is an arithmetic number, because the mean of its divisors is an integer number (1177020).

Almost surely, 2^18227704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18227704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18832320).

18227704 is an abundant number, since it is smaller than the sum of its proper divisors (19436936).

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

18227704 is a wasteful number, since it uses less digits than its factorization.

18227704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 18227704 is about 4269.3915257329. The cubic root of 18227704 is about 263.1746106827.

Adding to 18227704 its reverse (40772281), we get a palindrome (58999985).

It can be divided in two parts, 18 and 227704, that added together give a palindrome (227722).

The spelling of 18227704 in words is "eighteen million, two hundred twenty-seven thousand, seven hundred four".