20740500816 has 160 divisors (see below), whose sum is σ = 62549329920. Its totient is φ = 5799900672.

The previous prime is 20740500811. The next prime is 20740500817. The reversal of 20740500816 is 61800504702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740500811) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3036381 + ... + 3043203.

It is an arithmetic number, because the mean of its divisors is an integer number (390933312).

Almost surely, 2^20740500816 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 20740500816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31274664960).

20740500816 is an abundant number, since it is smaller than the sum of its proper divisors (41808829104).

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

20740500816 is a wasteful number, since it uses less digits than its factorization.

20740500816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033 (or 7027 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 20740500816 in words is "twenty billion, seven hundred forty million, five hundred thousand, eight hundred sixteen".