20829426812 has 12 divisors (see below), whose sum is σ = 36463504896. Its totient is φ = 10411282560.

The previous prime is 20829426811. The next prime is 20829426853. The reversal of 20829426812 is 21862492802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829426811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844028 + ... + 868355.

It is an arithmetic number, because the mean of its divisors is an integer number (3038625408).

Almost surely, 2^20829426812 is an apocalyptic number.

It is an amenable number.

20829426812 is a deficient number, since it is larger than the sum of its proper divisors (15634078084).

20829426812 is a wasteful number, since it uses less digits than its factorization.

20829426812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715428 (or 1715426 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 20829426812 in words is "twenty billion, eight hundred twenty-nine million, four hundred twenty-six thousand, eight hundred twelve".