20560418663 has 16 divisors (see below), whose sum is σ = 21052516800. Its totient is φ = 20075904000.

The previous prime is 20560418651. The next prime is 20560418689. The reversal of 20560418663 is 36681406502.

It is a cyclic number.

It is not a de Polignac number, because 20560418663 - 2¹⁴ = 20560402279 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 20560418663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560418603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2177693 + ... + 2187113.

It is an arithmetic number, because the mean of its divisors is an integer number (1315782300).

Almost surely, 2^20560418663 is an apocalyptic number.

20560418663 is a deficient number, since it is larger than the sum of its proper divisors (492098137).

20560418663 is a wasteful number, since it uses less digits than its factorization.

20560418663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9818.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 20560418663 in words is "twenty billion, five hundred sixty million, four hundred eighteen thousand, six hundred sixty-three".