20562296978217 has 8 divisors (see below), whose sum is σ = 27418130261280. Its totient is φ = 13707330840320.

The previous prime is 20562296978129. The next prime is 20562296978219. The reversal of 20562296978217 is 71287969226502.

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 20562296978217 - 2³¹ = 20560149494569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20562296978219) 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, 216730959 + ... + 216825812.

It is an arithmetic number, because the mean of its divisors is an integer number (3427266282660).

Almost surely, 2^{20562296978217} is an apocalyptic number.

It is an amenable number.

20562296978217 is a deficient number, since it is larger than the sum of its proper divisors (6855833283063).

20562296978217 is a wasteful number, since it uses less digits than its factorization.

20562296978217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433572583.

The product of its (nonzero) digits is 91445760, while the sum is 66.

The spelling of 20562296978217 in words is "twenty trillion, five hundred sixty-two billion, two hundred ninety-six million, nine hundred seventy-eight thousand, two hundred seventeen".