18351666666850 has 48 divisors (see below), whose sum is σ = 37401240783456. Its totient is φ = 6643935344000.

The previous prime is 18351666666737. The next prime is 18351666666857. The reversal of 18351666666850 is 5866666615381.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18351666666857) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 73370011 + ... + 73619710.

It is an arithmetic number, because the mean of its divisors is an integer number (779192516322).

Almost surely, 2^{18351666666850} is an apocalyptic number.

18351666666850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18351666666850 is an abundant number, since it is smaller than the sum of its proper divisors (19049574116606).

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

18351666666850 is a wasteful number, since it uses less digits than its factorization.

18351666666850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146989971 (or 146989966 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 67.

The spelling of 18351666666850 in words is "eighteen trillion, three hundred fifty-one billion, six hundred sixty-six million, six hundred sixty-six thousand, eight hundred fifty".