18518351666852 has 24 divisors (see below), whose sum is σ = 33297665514624. Its totient is φ = 9004953732192.

The previous prime is 18518351666839. The next prime is 18518351666891. The reversal of 18518351666852 is 25866615381581.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27261308 + ... + 27932339.

It is an arithmetic number, because the mean of its divisors is an integer number (1387402729776).

Almost surely, 2^{18518351666852} is an apocalyptic number.

It is an amenable number.

18518351666852 is a deficient number, since it is larger than the sum of its proper divisors (14779313847772).

18518351666852 is a wasteful number, since it uses less digits than its factorization.

18518351666852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55195955 (or 55195953 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 65.

The spelling of 18518351666852 in words is "eighteen trillion, five hundred eighteen billion, three hundred fifty-one million, six hundred sixty-six thousand, eight hundred fifty-two".