19791367428 has 192 divisors, whose sum is σ = 59556446208. Its totient is φ = 4981954560.

The previous prime is 19791367391. The next prime is 19791367429. The reversal of 19791367428 is 82476319791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19791367429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1537258 + ... + 1550078.

It is an arithmetic number, because the mean of its divisors is an integer number (310189824).

Almost surely, 2^19791367428 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 19791367428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29778223104).

19791367428 is an abundant number, since it is smaller than the sum of its proper divisors (39765078780).

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

19791367428 is a wasteful number, since it uses less digits than its factorization.

19791367428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922 (or 12920 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The spelling of 19791367428 in words is "nineteen billion, seven hundred ninety-one million, three hundred sixty-seven thousand, four hundred twenty-eight".