19870504432 has 40 divisors (see below), whose sum is σ = 39896218800. Its totient is φ = 9575903232.

The previous prime is 19870504427. The next prime is 19870504439. The reversal of 19870504432 is 23440507891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19870504439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230619 + ... + 304837.

It is an arithmetic number, because the mean of its divisors is an integer number (997405470).

Almost surely, 2^19870504432 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 19870504432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19948109400).

19870504432 is an abundant number, since it is smaller than the sum of its proper divisors (20025714368).

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

19870504432 is a wasteful number, since it uses less digits than its factorization.

19870504432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74833 (or 74827 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 19870504432 in words is "nineteen billion, eight hundred seventy million, five hundred four thousand, four hundred thirty-two".