18668353683500 has 48 divisors (see below), whose sum is σ = 40778473855392. Its totient is φ = 7466097992000.

The previous prime is 18668353683481. The next prime is 18668353683503. The reversal of 18668353683500 is 538635386681.

It is not an unprimeable number, because it can be changed into a prime (18668353683503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100199 + ... + 6111198.

It is an arithmetic number, because the mean of its divisors is an integer number (849551538654).

Almost surely, 2^{18668353683500} is an apocalyptic number.

18668353683500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18668353683500 is an abundant number, since it is smaller than the sum of its proper divisors (22110120171892).

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

18668353683500 is a wasteful number, since it uses less digits than its factorization.

18668353683500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217427 (or 6217415 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 62.

The spelling of 18668353683500 in words is "eighteen trillion, six hundred sixty-eight billion, three hundred fifty-three million, six hundred eighty-three thousand, five hundred".