18006550000506 has 20 divisors (see below), whose sum is σ = 40348010186682. Its totient is φ = 6002183333448.

The previous prime is 18006550000471. The next prime is 18006550000513. The reversal of 18006550000506 is 60500005560081.

It can be written as a sum of positive squares in only one way, i.e., 17496526923225 + 510023077281 = 4182885^2 + 714159^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55575771445 + ... + 55575771768.

Almost surely, 2^{18006550000506} is an apocalyptic number.

18006550000506 is an abundant number, since it is smaller than the sum of its proper divisors (22341460186176).

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

18006550000506 is a wasteful number, since it uses less digits than its factorization.

18006550000506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111151543227 (or 111151543218 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 18006550000506 its reverse (60500005560081), we get a palindrome (78506555560587).

The spelling of 18006550000506 in words is "eighteen trillion, six billion, five hundred fifty million, five hundred six", and thus it is an aban number.