20670561056 has 24 divisors (see below), whose sum is σ = 40737312000. Its totient is φ = 10324577088.

The previous prime is 20670561031. The next prime is 20670561071. The reversal of 20670561056 is 65016507602.

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, 303056 + ... + 364943.

It is an arithmetic number, because the mean of its divisors is an integer number (1697388000).

Almost surely, 2^20670561056 is an apocalyptic number.

It is an amenable number.

20670561056 is a deficient number, since it is larger than the sum of its proper divisors (20066750944).

20670561056 is an equidigital number, since it uses as much as digits as its factorization.

20670561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668976 (or 668968 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 20670561056 in words is "twenty billion, six hundred seventy million, five hundred sixty-one thousand, fifty-six".