20859636801696 has 432 divisors, whose sum is σ = 70121855859552. Its totient is φ = 5409693864960.

The previous prime is 20859636801673. The next prime is 20859636801709. The reversal of 20859636801696 is 69610863695802.

It is a self number, because there is not a number n which added to its sum of digits gives 20859636801696.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 371649091 + ... + 371705213.

It is an arithmetic number, because the mean of its divisors is an integer number (162319110786).

Almost surely, 2^{20859636801696} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20859636801696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35060927929776).

20859636801696 is an abundant number, since it is smaller than the sum of its proper divisors (49262219057856).

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

20859636801696 is a wasteful number, since it uses less digits than its factorization.

20859636801696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56825 (or 56799 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 69.

The spelling of 20859636801696 in words is "twenty trillion, eight hundred fifty-nine billion, six hundred thirty-six million, eight hundred one thousand, six hundred ninety-six".