20795636736 has 264 divisors, whose sum is σ = 71172716160. Its totient is φ = 5941112832.

The previous prime is 20795636711. The next prime is 20795636747. The reversal of 20795636736 is 63763659702.

20795636736 is a `hidden beast` number, since 2 + 0 + 7 + 9 + 563 + 6 + 73 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1735855 + ... + 1747793.

Almost surely, 2^20795636736 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 20795636736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35586358080).

20795636736 is an abundant number, since it is smaller than the sum of its proper divisors (50377079424).

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

20795636736 is an equidigital number, since it uses as much as digits as its factorization.

20795636736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11981 (or 11951 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 54.

The spelling of 20795636736 in words is "twenty billion, seven hundred ninety-five million, six hundred thirty-six thousand, seven hundred thirty-six".