19690798080 has 352 divisors, whose sum is σ = 67663404864. Its totient is φ = 4869586944.

The previous prime is 19690798069. The next prime is 19690798087. The reversal of 19690798080 is 8089709691.

It is a self number, because there is not a number n which added to its sum of digits gives 19690798080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690798087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19061244 + ... + 19062276.

It is an arithmetic number, because the mean of its divisors is an integer number (192225582).

Almost surely, 2^19690798080 is an apocalyptic number.

19690798080 is a gapful number since it is divisible by the number (10) 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 19690798080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33831702432).

19690798080 is an abundant number, since it is smaller than the sum of its proper divisors (47972606784).

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

19690798080 is a wasteful number, since it uses less digits than its factorization.

19690798080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 19690798080 in words is "nineteen billion, six hundred ninety million, seven hundred ninety-eight thousand, eighty".