20965785595056 has 60 divisors (see below), whose sum is σ = 58676348050008. Its totient is φ = 6988444227072.

The previous prime is 20965785595019. The next prime is 20965785595057. The reversal of 20965785595056 is 65059558756902.

20965785595056 is a `hidden beast` number, since 2 + 0 + 9 + 65 + 7 + 8 + 5 + 59 + 505 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (20965785595057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5217871 + ... + 8316113.

Almost surely, 2^{20965785595056} is an apocalyptic number.

It is an amenable number.

20965785595056 is an abundant number, since it is smaller than the sum of its proper divisors (37710562454952).

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

20965785595056 is a wasteful number, since it uses less digits than its factorization.

20965785595056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145250 (or 3145241 counting only the distinct ones).

The product of its (nonzero) digits is 1020600000, while the sum is 72.

The spelling of 20965785595056 in words is "twenty trillion, nine hundred sixty-five billion, seven hundred eighty-five million, five hundred ninety-five thousand, fifty-six".