19798504704 has 216 divisors, whose sum is σ = 64582076832. Its totient is φ = 5999339520.

The previous prime is 19798504703. The next prime is 19798504717. The reversal of 19798504704 is 40740589791.

19798504704 is a `hidden beast` number, since 1 + 97 + 9 + 85 + 0 + 470 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19798504703) 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, 669822 + ... + 698754.

Almost surely, 2^19798504704 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 19798504704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32291038416).

19798504704 is an abundant number, since it is smaller than the sum of its proper divisors (44783572128).

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

19798504704 is an equidigital number, since it uses as much as digits as its factorization.

19798504704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28975 (or 28949 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 19798504704 in words is "nineteen billion, seven hundred ninety-eight million, five hundred four thousand, seven hundred four".