18004459918 has 8 divisors (see below), whose sum is σ = 27060813000. Its totient is φ = 8984188920.

The previous prime is 18004459903. The next prime is 18004459931. The reversal of 18004459918 is 81995440081.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 9019273 + ... + 9021268.

It is an arithmetic number, because the mean of its divisors is an integer number (3382601625).

Almost surely, 2^18004459918 is an apocalyptic number.

18004459918 is a deficient number, since it is larger than the sum of its proper divisors (9056353082).

18004459918 is a wasteful number, since it uses less digits than its factorization.

18004459918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18041042.

The product of its (nonzero) digits is 414720, while the sum is 49.

Adding to 18004459918 its reverse (81995440081), we get a palindrome (99999899999).

The spelling of 18004459918 in words is "eighteen billion, four million, four hundred fifty-nine thousand, nine hundred eighteen".