19896315712 has 112 divisors (see below), whose sum is σ = 49319159680. Its totient is φ = 7753439232.

The previous prime is 19896315689. The next prime is 19896315739. The reversal of 19896315712 is 21751369891.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 19896315712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364714 + ... + 415702.

It is an arithmetic number, because the mean of its divisors is an integer number (440349640).

Almost surely, 2^19896315712 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 19896315712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24659579840).

19896315712 is an abundant number, since it is smaller than the sum of its proper divisors (29422843968).

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

19896315712 is a wasteful number, since it uses less digits than its factorization.

19896315712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51088 (or 51078 counting only the distinct ones).

The product of its digits is 816480, while the sum is 52.

The spelling of 19896315712 in words is "nineteen billion, eight hundred ninety-six million, three hundred fifteen thousand, seven hundred twelve".