19519354480 has 80 divisors (see below), whose sum is σ = 45795818880. Its totient is φ = 7736846336.

The previous prime is 19519354469. The next prime is 19519354487. The reversal of 19519354480 is 8445391591.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19519354487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7879002 + ... + 7881478.

It is an arithmetic number, because the mean of its divisors is an integer number (572447736).

Almost surely, 2^19519354480 is an apocalyptic number.

19519354480 is a gapful number since it is divisible by the number (10) 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 19519354480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22897909440).

19519354480 is an abundant number, since it is smaller than the sum of its proper divisors (26276464400).

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

19519354480 is a wasteful number, since it uses less digits than its factorization.

19519354480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 19519354480 in words is "nineteen billion, five hundred nineteen million, three hundred fifty-four thousand, four hundred eighty".