18353666852 has 6 divisors (see below), whose sum is σ = 32118916998. Its totient is φ = 9176833424.

The previous prime is 18353666843. The next prime is 18353666857. The reversal of 18353666852 is 25866635381.

It can be written as a sum of positive squares in only one way, i.e., 18027358756 + 326308096 = 134266^2 + 18064^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18353666794 and 18353666803.

It is not an unprimeable number, because it can be changed into a prime (18353666857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2294208353 + ... + 2294208360.

It is an arithmetic number, because the mean of its divisors is an integer number (5353152833).

Almost surely, 2^18353666852 is an apocalyptic number.

It is an amenable number.

18353666852 is a deficient number, since it is larger than the sum of its proper divisors (13765250146).

18353666852 is a wasteful number, since it uses less digits than its factorization.

18353666852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588416717 (or 4588416715 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 53.

The spelling of 18353666852 in words is "eighteen billion, three hundred fifty-three million, six hundred sixty-six thousand, eight hundred fifty-two".