18520336866700 has 36 divisors (see below), whose sum is σ = 40193120600640. Its totient is φ = 7407399336640.

The previous prime is 18520336866697. The next prime is 18520336866701. The reversal of 18520336866700 is 766863302581.

It is not an unprimeable number, because it can be changed into a prime (18520336866701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8179687 + ... + 10195486.

It is an arithmetic number, because the mean of its divisors is an integer number (1116475572240).

Almost surely, 2^{18520336866700} is an apocalyptic number.

18520336866700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18520336866700 is an abundant number, since it is smaller than the sum of its proper divisors (21672783733940).

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

18520336866700 is a wasteful number, since it uses less digits than its factorization.

18520336866700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18385266 (or 18385259 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 18520336866700 in words is "eighteen trillion, five hundred twenty billion, three hundred thirty-six million, eight hundred sixty-six thousand, seven hundred".