19619299008 has 336 divisors, whose sum is σ = 61858611360. Its totient is φ = 6154444800.

The previous prime is 19619299001. The next prime is 19619299031. The reversal of 19619299008 is 80099291691.

19619299008 is a `hidden beast` number, since 19 + 619 + 2 + 9 + 9 + 0 + 0 + 8 = 666.

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 (19619299001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18490798 + ... + 18491858.

It is an arithmetic number, because the mean of its divisors is an integer number (184103010).

Almost surely, 2^19619299008 is an apocalyptic number.

19619299008 is a gapful number since it is divisible by the number (18) 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 19619299008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30929305680).

19619299008 is an abundant number, since it is smaller than the sum of its proper divisors (42239312352).

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

19619299008 is a wasteful number, since it uses less digits than its factorization.

19619299008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The spelling of 19619299008 in words is "nineteen billion, six hundred nineteen million, two hundred ninety-nine thousand, eight".