18386722050500 has 24 divisors (see below), whose sum is σ = 40156600959384. Its totient is φ = 7354688820000.

The previous prime is 18386722050479. The next prime is 18386722050547. The reversal of 18386722050500 is 505022768381.

It can be written as a sum of positive squares in 4 ways, for example, as 2669112922564 + 15717609127936 = 1633742^2 + 3964544^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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, 18386721551 + ... + 18386722550.

It is an arithmetic number, because the mean of its divisors is an integer number (1673191706641).

Almost surely, 2^{18386722050500} is an apocalyptic number.

18386722050500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18386722050500 is an abundant number, since it is smaller than the sum of its proper divisors (21769878908884).

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

18386722050500 is a wasteful number, since it uses less digits than its factorization.

18386722050500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36773444120 (or 36773444108 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 18386722050500 in words is "eighteen trillion, three hundred eighty-six billion, seven hundred twenty-two million, fifty thousand, five hundred".