20559027217 has 8 divisors (see below), whose sum is σ = 21720470400. Its totient is φ = 19427751504.

The previous prime is 20559027193. The next prime is 20559027221. The reversal of 20559027217 is 71272095502.

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 20559027217 - 2¹⁹ = 20558502929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20559027217.

It is not an unprimeable number, because it can be changed into a prime (20559027257) 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, 7540467 + ... + 7543192.

It is an arithmetic number, because the mean of its divisors is an integer number (2715058800).

Almost surely, 2^20559027217 is an apocalyptic number.

It is an amenable number.

20559027217 is a deficient number, since it is larger than the sum of its proper divisors (1161443183).

20559027217 is a wasteful number, since it uses less digits than its factorization.

20559027217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15083735.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 20559027217 in words is "twenty billion, five hundred fifty-nine million, twenty-seven thousand, two hundred seventeen".