20191705952255 has 8 divisors (see below), whose sum is σ = 24317520238752. Its totient is φ = 16095049364448.

The previous prime is 20191705952251. The next prime is 20191705952279. The reversal of 20191705952255 is 55225950719102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20191705952255 - 2² = 20191705952251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20191705952197 and 20191705952206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20191705952251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7289423147 + ... + 7289425916.

It is an arithmetic number, because the mean of its divisors is an integer number (3039690029844).

Almost surely, 2^{20191705952255} is an apocalyptic number.

20191705952255 is a deficient number, since it is larger than the sum of its proper divisors (4125814286497).

20191705952255 is a wasteful number, since it uses less digits than its factorization.

20191705952255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14578849345.

The product of its (nonzero) digits is 2835000, while the sum is 53.

The spelling of 20191705952255 in words is "twenty trillion, one hundred ninety-one billion, seven hundred five million, nine hundred fifty-two thousand, two hundred fifty-five".