20560664554 has 8 divisors (see below), whose sum is σ = 30853189728. Its totient is φ = 10276267980.

The previous prime is 20560664521. The next prime is 20560664563. The reversal of 20560664554 is 45546606502.

It is a happy number.

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

It is a super-2 number, since 2×20560664554² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20560664554.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2025822 + ... + 2035945.

It is an arithmetic number, because the mean of its divisors is an integer number (3856648716).

Almost surely, 2^20560664554 is an apocalyptic number.

20560664554 is a deficient number, since it is larger than the sum of its proper divisors (10292525174).

20560664554 is a wasteful number, since it uses less digits than its factorization.

20560664554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064300.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 20560664554 in words is "twenty billion, five hundred sixty million, six hundred sixty-four thousand, five hundred fifty-four".