18218538113272 has 16 divisors (see below), whose sum is σ = 39039724528560. Its totient is φ = 7807944905664.

The previous prime is 18218538113233. The next prime is 18218538113287. The reversal of 18218538113272 is 27231183581281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162665518813 + ... + 162665518924.

It is an arithmetic number, because the mean of its divisors is an integer number (2439982783035).

Almost surely, 2^{18218538113272} is an apocalyptic number.

It is an amenable number.

18218538113272 is an abundant number, since it is smaller than the sum of its proper divisors (20821186415288).

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

18218538113272 is a wasteful number, since it uses less digits than its factorization.

18218538113272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325331037750 (or 325331037746 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 52.

The spelling of 18218538113272 in words is "eighteen trillion, two hundred eighteen billion, five hundred thirty-eight million, one hundred thirteen thousand, two hundred seventy-two".