20756220823885 has 8 divisors (see below), whose sum is σ = 25279218197856. Its totient is φ = 16357141186320.

The previous prime is 20756220823861. The next prime is 20756220823889. The reversal of 20756220823885 is 58832802265702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20756220823885 - 2⁷ = 20756220823757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20756220823889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30979433731 + ... + 30979434400.

It is an arithmetic number, because the mean of its divisors is an integer number (3159902274732).

Almost surely, 2^{20756220823885} is an apocalyptic number.

It is an amenable number.

20756220823885 is a deficient number, since it is larger than the sum of its proper divisors (4522997373971).

20756220823885 is an equidigital number, since it uses as much as digits as its factorization.

20756220823885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61958868203.

The product of its (nonzero) digits is 25804800, while the sum is 58.

The spelling of 20756220823885 in words is "twenty trillion, seven hundred fifty-six billion, two hundred twenty million, eight hundred twenty-three thousand, eight hundred eighty-five".