19643039468 has 12 divisors (see below), whose sum is σ = 37019574480. Its totient is φ = 9066018192.

The previous prime is 19643039447. The next prime is 19643039473. The reversal of 19643039468 is 86493034691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188875328 + ... + 188875431.

It is an arithmetic number, because the mean of its divisors is an integer number (3084964540).

Almost surely, 2^19643039468 is an apocalyptic number.

It is an amenable number.

19643039468 is a deficient number, since it is larger than the sum of its proper divisors (17376535012).

19643039468 is a wasteful number, since it uses less digits than its factorization.

19643039468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377750776 (or 377750774 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 19643039468 in words is "nineteen billion, six hundred forty-three million, thirty-nine thousand, four hundred sixty-eight".