19628018708 has 6 divisors (see below), whose sum is σ = 34349032746. Its totient is φ = 9814009352.

The previous prime is 19628018659. The next prime is 19628018717. The reversal of 19628018708 is 80781082691.

It can be written as a sum of positive squares in only one way, i.e., 18697280644 + 930738064 = 136738^2 + 30508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2453502335 + ... + 2453502342.

It is an arithmetic number, because the mean of its divisors is an integer number (5724838791).

Almost surely, 2^19628018708 is an apocalyptic number.

It is an amenable number.

19628018708 is a deficient number, since it is larger than the sum of its proper divisors (14721014038).

19628018708 is a wasteful number, since it uses less digits than its factorization.

19628018708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907004681 (or 4907004679 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 19628018708 in words is "nineteen billion, six hundred twenty-eight million, eighteen thousand, seven hundred eight".