20738059856836 has 81 divisors (see below), whose sum is σ = 42425315114637. Its totient is φ = 8844049764480.

The previous prime is 20738059856819. The next prime is 20738059856867. The reversal of 20738059856836 is 63865895083702.

The square root of 20738059856836 is 4553906.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3523526935236 + 17214532921600 = 1877106^2 + 4149040^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15237368796 + ... + 15237370156.

Almost surely, 2^{20738059856836} is an apocalyptic number.

20738059856836 is the 4553906-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20738059856836

20738059856836 is an abundant number, since it is smaller than the sum of its proper divisors (21687255257801).

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

20738059856836 is an frugal number, since it uses more digits than its factorization.

20738059856836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 70.

The spelling of 20738059856836 in words is "twenty trillion, seven hundred thirty-eight billion, fifty-nine million, eight hundred fifty-six thousand, eight hundred thirty-six".