20856011497068 has 48 divisors (see below), whose sum is σ = 53214129239040. Its totient is φ = 6304991582400.

The previous prime is 20856011497039. The next prime is 20856011497073. The reversal of 20856011497068 is 86079411065802.

It is a junction number, because it is equal to n+sod(n) for n = 20856011496999 and 20856011497017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187592988 + ... + 187704131.

It is an arithmetic number, because the mean of its divisors is an integer number (1108627692480).

Almost surely, 2^{20856011497068} is an apocalyptic number.

It is an amenable number.

20856011497068 is an abundant number, since it is smaller than the sum of its proper divisors (32358117741972).

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

20856011497068 is a wasteful number, since it uses less digits than its factorization.

20856011497068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375297558 (or 375297556 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 20856011497068 in words is "twenty trillion, eight hundred fifty-six billion, eleven million, four hundred ninety-seven thousand, sixty-eight".