19940798304 has 144 divisors (see below), whose sum is σ = 64912603392. Its totient is φ = 5688140544.

The previous prime is 19940798303. The next prime is 19940798321. The reversal of 19940798304 is 40389704991.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19940798303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1288597 + ... + 1303979.

It is an arithmetic number, because the mean of its divisors is an integer number (450781968).

Almost surely, 2^19940798304 is an apocalyptic number.

19940798304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19940798304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32456301696).

19940798304 is an abundant number, since it is smaller than the sum of its proper divisors (44971805088).

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

19940798304 is a wasteful number, since it uses less digits than its factorization.

19940798304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16049 (or 16038 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 19940798304 in words is "nineteen billion, nine hundred forty million, seven hundred ninety-eight thousand, three hundred four".