20795856136 has 64 divisors (see below), whose sum is σ = 44844724800. Its totient is φ = 8941363200.

The previous prime is 20795856131. The next prime is 20795856143. The reversal of 20795856136 is 63165859702.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20795856131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1116016 + ... + 1134496.

It is an arithmetic number, because the mean of its divisors is an integer number (700698825).

Almost surely, 2^20795856136 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 20795856136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22422362400).

20795856136 is an abundant number, since it is smaller than the sum of its proper divisors (24048868664).

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

20795856136 is a wasteful number, since it uses less digits than its factorization.

20795856136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19190 (or 19186 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 20795856136 in words is "twenty billion, seven hundred ninety-five million, eight hundred fifty-six thousand, one hundred thirty-six".