20873261633256 has 48 divisors (see below), whose sum is σ = 56532562877700. Its totient is φ = 6957653862912.

The previous prime is 20873261633233. The next prime is 20873261633267. The reversal of 20873261633256 is 65233616237802.

20873261633256 is a `hidden beast` number, since 2 + 0 + 8 + 7 + 326 + 1 + 63 + 3 + 256 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17789550030756 + 3083711602500 = 4217766^2 + 1756050^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3047110 + ... + 7143626.

Almost surely, 2^{20873261633256} is an apocalyptic number.

It is an amenable number.

20873261633256 is an abundant number, since it is smaller than the sum of its proper divisors (35659301244444).

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

20873261633256 is a wasteful number, since it uses less digits than its factorization.

20873261633256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167298 (or 4167291 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 20873261633256 in words is "twenty trillion, eight hundred seventy-three billion, two hundred sixty-one million, six hundred thirty-three thousand, two hundred fifty-six".