18368705500 has 48 divisors (see below), whose sum is σ = 41201544384. Its totient is φ = 7148894400.

The previous prime is 18368705489. The next prime is 18368705501. The reversal of 18368705500 is 550786381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368705501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477952 + ... + 514951.

It is an arithmetic number, because the mean of its divisors is an integer number (858365508).

Almost surely, 2^18368705500 is an apocalyptic number.

18368705500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18368705500 is an abundant number, since it is smaller than the sum of its proper divisors (22832838884).

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

18368705500 is a wasteful number, since it uses less digits than its factorization.

18368705500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992959 (or 992947 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 18368705500 in words is "eighteen billion, three hundred sixty-eight million, seven hundred five thousand, five hundred".