19430519808 has 176 divisors, whose sum is σ = 60790070144. Its totient is φ = 5401313280.

The previous prime is 19430519743. The next prime is 19430519821. The reversal of 19430519808 is 80891503491.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783438 + ... + 807858.

Almost surely, 2^19430519808 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 19430519808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30395035072).

19430519808 is an abundant number, since it is smaller than the sum of its proper divisors (41359550336).

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

19430519808 is a wasteful number, since it uses less digits than its factorization.

19430519808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24488 (or 24470 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 19430519808 in words is "nineteen billion, four hundred thirty million, five hundred nineteen thousand, eight hundred eight".