20684226636 has 48 divisors (see below), whose sum is σ = 53716370400. Its totient is φ = 6883094016.

The previous prime is 20684226613. The next prime is 20684226677. The reversal of 20684226636 is 63662248602.

20684226636 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 4 + 2 + 2 + 6 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20684226591 and 20684226600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97441 + ... + 225528.

It is an arithmetic number, because the mean of its divisors is an integer number (1119091050).

Almost surely, 2^20684226636 is an apocalyptic number.

It is an amenable number.

20684226636 is an abundant number, since it is smaller than the sum of its proper divisors (33032143764).

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

20684226636 is a wasteful number, since it uses less digits than its factorization.

20684226636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323575 (or 323567 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 20684226636 in words is "twenty billion, six hundred eighty-four million, two hundred twenty-six thousand, six hundred thirty-six".