19423907328 has 720 divisors, whose sum is σ = 68741671680. Its totient is φ = 4843044864.

The previous prime is 19423907291. The next prime is 19423907329. The reversal of 19423907328 is 82370932491.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19423907329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 413274601 + ... + 413274647.

It is an arithmetic number, because the mean of its divisors is an integer number (95474544).

Almost surely, 2^19423907328 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 19423907328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34370835840).

19423907328 is an abundant number, since it is smaller than the sum of its proper divisors (49317764352).

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

19423907328 is a wasteful number, since it uses less digits than its factorization.

19423907328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 19423907328 in words is "nineteen billion, four hundred twenty-three million, nine hundred seven thousand, three hundred twenty-eight".