19691404628 has 24 divisors (see below), whose sum is σ = 39399360000. Its totient is φ = 8435626848.

The previous prime is 19691404597. The next prime is 19691404651. The reversal of 19691404628 is 82640419691.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 79403 + ... + 213746.

It is an arithmetic number, because the mean of its divisors is an integer number (1641640000).

Almost surely, 2^19691404628 is an apocalyptic number.

It is an amenable number.

19691404628 is an abundant number, since it is smaller than the sum of its proper divisors (19707955372).

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

19691404628 is a wasteful number, since it uses less digits than its factorization.

19691404628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295559 (or 295557 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 19691404628 in words is "nineteen billion, six hundred ninety-one million, four hundred four thousand, six hundred twenty-eight".