18520323605700 has 72 divisors (see below), whose sum is σ = 61240536729792. Its totient is φ = 4233216823680.

The previous prime is 18520323605699. The next prime is 18520323605711. The reversal of 18520323605700 is 750632302581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4409598759 + ... + 4409602958.

It is an arithmetic number, because the mean of its divisors is an integer number (850563010136).

Almost surely, 2^{18520323605700} is an apocalyptic number.

18520323605700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18520323605700 is an abundant number, since it is smaller than the sum of its proper divisors (42720213124092).

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

18520323605700 is a wasteful number, since it uses less digits than its factorization.

18520323605700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819201741 (or 8819201734 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 18520323605700 in words is "eighteen trillion, five hundred twenty billion, three hundred twenty-three million, six hundred five thousand, seven hundred".