20485580564 has 24 divisors (see below), whose sum is σ = 36582876288. Its totient is φ = 10033930400.

The previous prime is 20485580539. The next prime is 20485580579. The reversal of 20485580564 is 46508558402.

It is a super-2 number, since 2×20485580564² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62489 + ... + 211839.

It is an arithmetic number, because the mean of its divisors is an integer number (1524286512).

Almost surely, 2^20485580564 is an apocalyptic number.

It is an amenable number.

20485580564 is a deficient number, since it is larger than the sum of its proper divisors (16097295724).

20485580564 is a wasteful number, since it uses less digits than its factorization.

20485580564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150055 (or 150053 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 47.

The spelling of 20485580564 in words is "twenty billion, four hundred eighty-five million, five hundred eighty thousand, five hundred sixty-four".