19897065032 has 64 divisors (see below), whose sum is σ = 42049687680. Its totient is φ = 8757568512.

The previous prime is 19897065007. The next prime is 19897065043. The reversal of 19897065032 is 23056079891.

It is a super-2 number, since 2×19897065032² (a number of 21 digits) contains 22 as substring.

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, 793763 + ... + 818445.

It is an arithmetic number, because the mean of its divisors is an integer number (657026370).

Almost surely, 2^19897065032 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 19897065032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21024843840).

19897065032 is an abundant number, since it is smaller than the sum of its proper divisors (22152622648).

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

19897065032 is a wasteful number, since it uses less digits than its factorization.

19897065032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25062 (or 25058 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 19897065032 in words is "nineteen billion, eight hundred ninety-seven million, sixty-five thousand, thirty-two".