19229713728 has 224 divisors, whose sum is σ = 53491912320. Its totient is φ = 6091407360.

The previous prime is 19229713697. The next prime is 19229713729. The reversal of 19229713728 is 82731792291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19229713729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62637351 + ... + 62637657.

It is an arithmetic number, because the mean of its divisors is an integer number (238803180).

Almost surely, 2^19229713728 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 19229713728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26745956160).

19229713728 is an abundant number, since it is smaller than the sum of its proper divisors (34262198592).

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

19229713728 is a wasteful number, since it uses less digits than its factorization.

19229713728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 535 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The spelling of 19229713728 in words is "nineteen billion, two hundred twenty-nine million, seven hundred thirteen thousand, seven hundred twenty-eight".