18351666668500 has 48 divisors (see below), whose sum is σ = 43723680017472. Its totient is φ = 6673333332000.

The previous prime is 18351666668483. The next prime is 18351666668513. The reversal of 18351666668500 is 586666615381.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1668327834 + ... + 1668338833.

It is an arithmetic number, because the mean of its divisors is an integer number (910910000364).

Almost surely, 2^{18351666668500} is an apocalyptic number.

18351666668500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18351666668500 is an abundant number, since it is smaller than the sum of its proper divisors (25372013348972).

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

18351666668500 is a wasteful number, since it uses less digits than its factorization.

18351666668500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336666697 (or 3336666685 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 18351666668500 in words is "eighteen trillion, three hundred fifty-one billion, six hundred sixty-six million, six hundred sixty-eight thousand, five hundred".