19506347808 has 96 divisors (see below), whose sum is σ = 54263696256. Its totient is φ = 6114275328.

The previous prime is 19506347801. The next prime is 19506347813. The reversal of 19506347808 is 80874360591.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (19506347801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121910 + ... + 2131082.

It is an arithmetic number, because the mean of its divisors is an integer number (565246836).

Almost surely, 2^19506347808 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 19506347808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27131848128).

19506347808 is an abundant number, since it is smaller than the sum of its proper divisors (34757348448).

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

19506347808 is a wasteful number, since it uses less digits than its factorization.

19506347808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506 (or 10498 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 19506347808 in words is "nineteen billion, five hundred six million, three hundred forty-seven thousand, eight hundred eight".