19995609006 has 48 divisors (see below), whose sum is σ = 45691626240. Its totient is φ = 6302273040.

The previous prime is 19995608999. The next prime is 19995609017. The reversal of 19995609006 is 60090659991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122971 + ... + 234761.

It is an arithmetic number, because the mean of its divisors is an integer number (951908880).

Almost surely, 2^19995609006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19995609006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22845813120).

19995609006 is an abundant number, since it is smaller than the sum of its proper divisors (25696017234).

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

19995609006 is a wasteful number, since it uses less digits than its factorization.

19995609006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112341 (or 112338 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The spelling of 19995609006 in words is "nineteen billion, nine hundred ninety-five million, six hundred nine thousand, six".