19786842504 has 576 divisors, whose sum is σ = 69016147200. Its totient is φ = 5066772480.

The previous prime is 19786842479. The next prime is 19786842511. The reversal of 19786842504 is 40524868791.

It is a happy number.

19786842504 is a `hidden beast` number, since 1 + 9 + 78 + 68 + 4 + 2 + 504 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 82790017 + ... + 82790255.

It is an arithmetic number, because the mean of its divisors is an integer number (119819700).

Almost surely, 2^19786842504 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 19786842504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34508073600).

19786842504 is an abundant number, since it is smaller than the sum of its proper divisors (49229304696).

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

19786842504 is a wasteful number, since it uses less digits than its factorization.

19786842504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 19786842504 in words is "nineteen billion, seven hundred eighty-six million, eight hundred forty-two thousand, five hundred four".