19961717363 has 6 divisors (see below), whose sum is σ = 23220773316. Its totient is φ = 17110043412.

The previous prime is 19961717341. The next prime is 19961717383. The reversal of 19961717363 is 36371716991.

It is not a de Polignac number, because 19961717363 - 2¹² = 19961713267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19961717333) 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 5 ways as a sum of consecutive naturals, for example, 203690945 + ... + 203691042.

It is an arithmetic number, because the mean of its divisors is an integer number (3870128886).

Almost surely, 2^19961717363 is an apocalyptic number.

19961717363 is a deficient number, since it is larger than the sum of its proper divisors (3259055953).

19961717363 is an equidigital number, since it uses as much as digits as its factorization.

19961717363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407382001 (or 407381994 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 53.

The spelling of 19961717363 in words is "nineteen billion, nine hundred sixty-one million, seven hundred seventeen thousand, three hundred sixty-three".