18007804 has 12 divisors (see below), whose sum is σ = 32883984. Its totient is φ = 8612384.

The previous prime is 18007783. The next prime is 18007817. The reversal of 18007804 is 40870081.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 97777 + ... + 97960.

It is an arithmetic number, because the mean of its divisors is an integer number (2740332).

Almost surely, 2^18007804 is an apocalyptic number.

It is an amenable number.

18007804 is a deficient number, since it is larger than the sum of its proper divisors (14876180).

18007804 is a wasteful number, since it uses less digits than its factorization.

18007804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195764 (or 195762 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 18007804 is about 4243.5602976746. The cubic root of 18007804 is about 262.1120085150.

Adding to 18007804 its reverse (40870081), we get a palindrome (58877885).

It can be divided in two parts, 1800 and 7804, that added together give a square (9604 = 98²).

The spelling of 18007804 in words is "eighteen million, seven thousand, eight hundred four".