19708226745 has 64 divisors (see below), whose sum is σ = 32380508160. Its totient is φ = 10233474048.

The previous prime is 19708226717. The next prime is 19708226771. The reversal of 19708226745 is 54762280791.

It is a happy number.

It is not a de Polignac number, because 19708226745 - 2¹⁰ = 19708225721 is a prime.

It is a Curzon 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 63 ways as a sum of consecutive naturals, for example, 44893236 + ... + 44893674.

It is an arithmetic number, because the mean of its divisors is an integer number (505945440).

Almost surely, 2^19708226745 is an apocalyptic number.

19708226745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19708226745 is a deficient number, since it is larger than the sum of its proper divisors (12672281415).

19708226745 is a wasteful number, since it uses less digits than its factorization.

19708226745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 19708226745 in words is "nineteen billion, seven hundred eight million, two hundred twenty-six thousand, seven hundred forty-five".