20894511857296 has 320 divisors, whose sum is σ = 53609468774400. Its totient is φ = 7706289507840.

The previous prime is 20894511857273. The next prime is 20894511857299. The reversal of 20894511857296 is 69275811549802.

It is not an unprimeable number, because it can be changed into a prime (20894511857299) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5588260195 + ... + 5588263933.

It is an arithmetic number, because the mean of its divisors is an integer number (167529589920).

Almost surely, 2^{20894511857296} 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 20894511857296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26804734387200).

20894511857296 is an abundant number, since it is smaller than the sum of its proper divisors (32714956917104).

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

20894511857296 is a wasteful number, since it uses less digits than its factorization.

20894511857296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779 (or 5751 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 67.

The spelling of 20894511857296 in words is "twenty trillion, eight hundred ninety-four billion, five hundred eleven million, eight hundred fifty-seven thousand, two hundred ninety-six".