20532743616 has 504 divisors, whose sum is σ = 73618545168. Its totient is φ = 5014732800.

The previous prime is 20532743603. The next prime is 20532743641. The reversal of 20532743616 is 61634723502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19351726 + ... + 19352786.

It is an arithmetic number, because the mean of its divisors is an integer number (146068542).

Almost surely, 2^20532743616 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 20532743616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36809272584).

20532743616 is an abundant number, since it is smaller than the sum of its proper divisors (53085801552).

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

20532743616 is a wasteful number, since it uses less digits than its factorization.

20532743616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 20532743616 in words is "twenty billion, five hundred thirty-two million, seven hundred forty-three thousand, six hundred sixteen".