18000015900003 has 12 divisors (see below), whose sum is σ = 26008095043008. Its totient is φ = 11996285026320.

The previous prime is 18000015900001. The next prime is 18000015900049. The reversal of 18000015900003 is 30000951000081.

It is not a de Polignac number, because 18000015900003 - 2¹ = 18000015900001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18000015900003.

It is not an unprimeable number, because it can be changed into a prime (18000015900001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310433875 + ... + 310491852.

It is an arithmetic number, because the mean of its divisors is an integer number (2167341253584).

Almost surely, 2^{18000015900003} is an apocalyptic number.

18000015900003 is a deficient number, since it is larger than the sum of its proper divisors (8008079143005).

18000015900003 is a wasteful number, since it uses less digits than its factorization.

18000015900003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620928954 (or 620928951 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 18000015900003 its reverse (30000951000081), we get a palindrome (48000966900084).

The spelling of 18000015900003 in words is "eighteen trillion, fifteen million, nine hundred thousand, three".