18081004 has 12 divisors (see below), whose sum is σ = 31782744. Its totient is φ = 9000224.

The previous prime is 18080999. The next prime is 18081023. The reversal of 18081004 is 40018081.

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, 9049 + ... + 10864.

It is an arithmetic number, because the mean of its divisors is an integer number (2648562).

Almost surely, 2^18081004 is an apocalyptic number.

It is an amenable number.

18081004 is a deficient number, since it is larger than the sum of its proper divisors (13701740).

18081004 is a wasteful number, since it uses less digits than its factorization.

18081004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20144 (or 20142 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 18081004 is about 4252.1763839239. The cubic root of 18081004 is about 262.4666817878.

Adding to 18081004 its reverse (40018081), we get a palindrome (58099085).

The spelling of 18081004 in words is "eighteen million, eighty-one thousand, four".