19494562664 has 64 divisors (see below), whose sum is σ = 38274086400. Its totient is φ = 9300096000.

The previous prime is 19494562621. The next prime is 19494562669. The reversal of 19494562664 is 46626549491.

It is not an unprimeable number, because it can be changed into a prime (19494562669) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3528224 + ... + 3533744.

It is an arithmetic number, because the mean of its divisors is an integer number (598032600).

Almost surely, 2^19494562664 is an apocalyptic number.

It is an amenable number.

19494562664 is a deficient number, since it is larger than the sum of its proper divisors (18779523736).

19494562664 is a wasteful number, since it uses less digits than its factorization.

19494562664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5794 (or 5790 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 56.

The spelling of 19494562664 in words is "nineteen billion, four hundred ninety-four million, five hundred sixty-two thousand, six hundred sixty-four".