18666855429030 has 256 divisors, whose sum is σ = 51529347936000. Its totient is φ = 4804902125568.

The previous prime is 18666855428999. The next prime is 18666855429077. The reversal of 18666855429030 is 3092455866681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2859064806 + ... + 2859071334.

It is an arithmetic number, because the mean of its divisors is an integer number (201286515375).

Almost surely, 2^{18666855429030} is an apocalyptic number.

18666855429030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18666855429030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25764673968000).

18666855429030 is an abundant number, since it is smaller than the sum of its proper divisors (32862492506970).

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

18666855429030 is a wasteful number, since it uses less digits than its factorization.

18666855429030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8808 (or 8802 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 63.

The spelling of 18666855429030 in words is "eighteen trillion, six hundred sixty-six billion, eight hundred fifty-five million, four hundred twenty-nine thousand, thirty".