18227004 has 24 divisors (see below), whose sum is σ = 44768640. Its totient is φ = 5755824.

The previous prime is 18227003. The next prime is 18227081. The reversal of 18227004 is 40072281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39744 + ... + 40199.

It is an arithmetic number, because the mean of its divisors is an integer number (1865360).

Almost surely, 2^18227004 is an apocalyptic number.

It is an amenable number.

18227004 is an abundant number, since it is smaller than the sum of its proper divisors (26541636).

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

18227004 is a wasteful number, since it uses less digits than its factorization.

18227004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79969 (or 79967 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 18227004 is about 4269.3095460507. The cubic root of 18227004 is about 263.1712417343.

Adding to 18227004 its reverse (40072281), we get a palindrome (58299285).

The spelling of 18227004 in words is "eighteen million, two hundred twenty-seven thousand, four".