19695667708536 has 128 divisors (see below), whose sum is σ = 51493542912000. Its totient is φ = 6265907191808.

The previous prime is 19695667708511. The next prime is 19695667708567. The reversal of 19695667708536 is 63580776659691.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1887818776 + ... + 1887829208.

It is an arithmetic number, because the mean of its divisors is an integer number (402293304000).

Almost surely, 2^{19695667708536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19695667708536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25746771456000).

19695667708536 is an abundant number, since it is smaller than the sum of its proper divisors (31797875203464).

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

19695667708536 is a wasteful number, since it uses less digits than its factorization.

19695667708536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17693 (or 17689 counting only the distinct ones).

The product of its (nonzero) digits is 3086294400, while the sum is 78.

The spelling of 19695667708536 in words is "nineteen trillion, six hundred ninety-five billion, six hundred sixty-seven million, seven hundred eight thousand, five hundred thirty-six".