19408920328 has 64 divisors (see below), whose sum is σ = 42086603520. Its totient is φ = 8219232000.

The previous prime is 19408920319. The next prime is 19408920329. The reversal of 19408920328 is 82302980491.

It is not an unprimeable number, because it can be changed into a prime (19408920329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3056725 + ... + 3063067.

It is an arithmetic number, because the mean of its divisors is an integer number (657603180).

Almost surely, 2^19408920328 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 19408920328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21043301760).

19408920328 is an abundant number, since it is smaller than the sum of its proper divisors (22677683192).

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

19408920328 is a wasteful number, since it uses less digits than its factorization.

19408920328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6998 (or 6994 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 19408920328 in words is "nineteen billion, four hundred eight million, nine hundred twenty thousand, three hundred twenty-eight".