18033272158 has 32 divisors (see below), whose sum is σ = 30342289248. Its totient is φ = 7965993600.

The previous prime is 18033272119. The next prime is 18033272219. The reversal of 18033272158 is 85127233081.

It is a happy number.

18033272158 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 18033272158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701248 + ... + 726508.

It is an arithmetic number, because the mean of its divisors is an integer number (948196539).

Almost surely, 2^18033272158 is an apocalyptic number.

18033272158 is a deficient number, since it is larger than the sum of its proper divisors (12309017090).

18033272158 is a wasteful number, since it uses less digits than its factorization.

18033272158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26188.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 18033272158 in words is "eighteen billion, thirty-three million, two hundred seventy-two thousand, one hundred fifty-eight".