19931340435606 has 96 divisors (see below), whose sum is σ = 45299030624640. Its totient is φ = 6326171394048.

The previous prime is 19931340435599. The next prime is 19931340435649. The reversal of 19931340435606 is 60653404313991.

It is a happy number.

19931340435606 is a `hidden beast` number, since 1 + 9 + 9 + 3 + 1 + 34 + 0 + 43 + 560 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 652850550 + ... + 652881078.

It is an arithmetic number, because the mean of its divisors is an integer number (471864902340).

Almost surely, 2^{19931340435606} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19931340435606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22649515312320).

19931340435606 is an abundant number, since it is smaller than the sum of its proper divisors (25367690189034).

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

19931340435606 is a wasteful number, since it uses less digits than its factorization.

19931340435606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51478 (or 51475 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 19931340435606 in words is "nineteen trillion, nine hundred thirty-one billion, three hundred forty million, four hundred thirty-five thousand, six hundred six".