18003133408 has 48 divisors (see below), whose sum is σ = 38364036480. Its totient is φ = 8266922496.

The previous prime is 18003133319. The next prime is 18003133417. The reversal of 18003133408 is 80433130081.

It is a super-2 number, since 2×18003133408² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18003133408.

It is a congruent number.

It is an unprimeable number.

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, 27888 + ... + 191791.

It is an arithmetic number, because the mean of its divisors is an integer number (799250760).

Almost surely, 2^18003133408 is an apocalyptic number.

It is an amenable number.

18003133408 is an abundant number, since it is smaller than the sum of its proper divisors (20360903072).

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

18003133408 is a wasteful number, since it uses less digits than its factorization.

18003133408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219899 (or 219891 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 18003133408 its reverse (80433130081), we get a palindrome (98436263489).

The spelling of 18003133408 in words is "eighteen billion, three million, one hundred thirty-three thousand, four hundred eight".