19969437328 has 80 divisors (see below), whose sum is σ = 41860177920. Its totient is φ = 9194508288.

The previous prime is 19969437263. The next prime is 19969437337. The reversal of 19969437328 is 82373496991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517753 + ... + 2525671.

It is an arithmetic number, because the mean of its divisors is an integer number (523252224).

Almost surely, 2^19969437328 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 19969437328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20930088960).

19969437328 is an abundant number, since it is smaller than the sum of its proper divisors (21890740592).

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

19969437328 is a wasteful number, since it uses less digits than its factorization.

19969437328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144 (or 8138 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 61.

The spelling of 19969437328 in words is "nineteen billion, nine hundred sixty-nine million, four hundred thirty-seven thousand, three hundred twenty-eight".