20097568736 has 72 divisors (see below), whose sum is σ = 46076264640. Its totient is φ = 8604029952.

The previous prime is 20097568709. The next prime is 20097568787. The reversal of 20097568736 is 63786579002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1575761 + ... + 1588463.

It is an arithmetic number, because the mean of its divisors is an integer number (639948120).

Almost surely, 2^20097568736 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 20097568736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23038132320).

20097568736 is an abundant number, since it is smaller than the sum of its proper divisors (25978695904).

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

20097568736 is a wasteful number, since it uses less digits than its factorization.

20097568736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13736 (or 13721 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 20097568736 in words is "twenty billion, ninety-seven million, five hundred sixty-eight thousand, seven hundred thirty-six".