20894396368 has 80 divisors (see below), whose sum is σ = 45196214400. Its totient is φ = 9311639040.

The previous prime is 20894396359. The next prime is 20894396389. The reversal of 20894396368 is 86369349802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402018 + ... + 451006.

It is an arithmetic number, because the mean of its divisors is an integer number (564952680).

Almost surely, 2^20894396368 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 20894396368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22598107200).

20894396368 is an abundant number, since it is smaller than the sum of its proper divisors (24301818032).

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

20894396368 is a wasteful number, since it uses less digits than its factorization.

20894396368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49100 (or 49094 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 58.

The spelling of 20894396368 in words is "twenty billion, eight hundred ninety-four million, three hundred ninety-six thousand, three hundred sixty-eight".