19963520801 has 32 divisors (see below), whose sum is σ = 25292010240. Its totient is φ = 15362113536.

The previous prime is 19963520791. The next prime is 19963520809. The reversal of 19963520801 is 10802536991.

It is a happy number.

It is not a de Polignac number, because 19963520801 - 2¹⁰ = 19963519777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19963520809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251585 + ... + 321281.

It is an arithmetic number, because the mean of its divisors is an integer number (790375320).

Almost surely, 2^19963520801 is an apocalyptic number.

It is an amenable number.

19963520801 is a deficient number, since it is larger than the sum of its proper divisors (5328489439).

19963520801 is a wasteful number, since it uses less digits than its factorization.

19963520801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69833.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 19963520801 in words is "nineteen billion, nine hundred sixty-three million, five hundred twenty thousand, eight hundred one".