20558573055560 has 32 divisors (see below), whose sum is σ = 46441079395200. Its totient is φ = 8190666552000.

The previous prime is 20558573055529. The next prime is 20558573055571. The reversal of 20558573055560 is 6555037585502.

It is a junction number, because it is equal to n+sod(n) for n = 20558573055496 and 20558573055505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023823280 + ... + 1023843359.

It is an arithmetic number, because the mean of its divisors is an integer number (1451283731100).

Almost surely, 2^{20558573055560} is an apocalyptic number.

20558573055560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20558573055560 is an abundant number, since it is smaller than the sum of its proper divisors (25882506339640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20558573055560 is a wasteful number, since it uses less digits than its factorization.

20558573055560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047666901 (or 2047666897 counting only the distinct ones).

The product of its (nonzero) digits is 31500000, while the sum is 56.

The spelling of 20558573055560 in words is "twenty trillion, five hundred fifty-eight billion, five hundred seventy-three million, fifty-five thousand, five hundred sixty".