19642336808 has 32 divisors (see below), whose sum is σ = 38041436160. Its totient is φ = 9498354240.

The previous prime is 19642336807. The next prime is 19642336829. The reversal of 19642336808 is 80863324691.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19642336807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381785 + ... + 430167.

It is an arithmetic number, because the mean of its divisors is an integer number (1188794880).

Almost surely, 2^19642336808 is an apocalyptic number.

It is an amenable number.

19642336808 is a deficient number, since it is larger than the sum of its proper divisors (18399099352).

19642336808 is a wasteful number, since it uses less digits than its factorization.

19642336808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50057 (or 50053 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 19642336808 in words is "nineteen billion, six hundred forty-two million, three hundred thirty-six thousand, eight hundred eight".