19527447768 has 16 divisors (see below), whose sum is σ = 48818619480. Its totient is φ = 6509149248.

The previous prime is 19527447763. The next prime is 19527447781. The reversal of 19527447768 is 86774472591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19527447761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406821805 + ... + 406821852.

Almost surely, 2^19527447768 is an apocalyptic number.

It is an amenable number.

19527447768 is an abundant number, since it is smaller than the sum of its proper divisors (29291171712).

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

19527447768 is a wasteful number, since it uses less digits than its factorization.

19527447768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813643666 (or 813643662 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 60.

The spelling of 19527447768 in words is "nineteen billion, five hundred twenty-seven million, four hundred forty-seven thousand, seven hundred sixty-eight".