18831686803146 has 128 divisors (see below), whose sum is σ = 50643167016960. Its totient is φ = 5063649313536.

The previous prime is 18831686803117. The next prime is 18831686803157. The reversal of 18831686803146 is 64130868613881.

18831686803146 is a `hidden beast` number, since 1 + 8 + 83 + 168 + 6 + 80 + 314 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106602625 + ... + 106779131.

It is an arithmetic number, because the mean of its divisors is an integer number (395649742320).

Almost surely, 2^{18831686803146} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18831686803146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25321583508480).

18831686803146 is an abundant number, since it is smaller than the sum of its proper divisors (31811480213814).

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

18831686803146 is a wasteful number, since it uses less digits than its factorization.

18831686803146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193145 (or 193139 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 18831686803146 in words is "eighteen trillion, eight hundred thirty-one billion, six hundred eighty-six million, eight hundred three thousand, one hundred forty-six".