18086745521518 has 64 divisors (see below), whose sum is σ = 29120368527360. Its totient is φ = 8406947907072.

The previous prime is 18086745521483. The next prime is 18086745521519. The reversal of 18086745521518 is 81512554768081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18086745521519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60899430 + ... + 61195702.

It is an arithmetic number, because the mean of its divisors is an integer number (455005758240).

Almost surely, 2^{18086745521518} is an apocalyptic number.

18086745521518 is a deficient number, since it is larger than the sum of its proper divisors (11033623005842).

18086745521518 is a wasteful number, since it uses less digits than its factorization.

18086745521518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296641.

The product of its (nonzero) digits is 21504000, while the sum is 61.

The spelling of 18086745521518 in words is "eighteen trillion, eighty-six billion, seven hundred forty-five million, five hundred twenty-one thousand, five hundred eighteen".