18631945434340 has 192 divisors, whose sum is σ = 46398003531264. Its totient is φ = 6151787937792.

The previous prime is 18631945434317. The next prime is 18631945434367. The reversal of 18631945434340 is 4343454913681.

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, 196901479 + ... + 196996081.

It is an arithmetic number, because the mean of its divisors is an integer number (241656268392).

Almost surely, 2^{18631945434340} is an apocalyptic number.

18631945434340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18631945434340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23199001765632).

18631945434340 is an abundant number, since it is smaller than the sum of its proper divisors (27766058096924).

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

18631945434340 is a wasteful number, since it uses less digits than its factorization.

18631945434340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95046 (or 95044 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 18631945434340 in words is "eighteen trillion, six hundred thirty-one billion, nine hundred forty-five million, four hundred thirty-four thousand, three hundred forty".