19209980928 has 88 divisors (see below), whose sum is σ = 51260449968. Its totient is φ = 6395969536.

The previous prime is 19209980921. The next prime is 19209980939. The reversal of 19209980928 is 82908990291.

It is not an unprimeable number, because it can be changed into a prime (19209980921) 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, 3108850 + ... + 3115022.

Almost surely, 2^19209980928 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 19209980928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25630224984).

19209980928 is an abundant number, since it is smaller than the sum of its proper divisors (32050469040).

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

19209980928 is a wasteful number, since it uses less digits than its factorization.

19209980928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209 (or 7191 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 57.

The spelling of 19209980928 in words is "nineteen billion, two hundred nine million, nine hundred eighty thousand, nine hundred twenty-eight".