20507716416 has 112 divisors (see below), whose sum is σ = 59414420160. Its totient is φ = 6191185920.

The previous prime is 20507716387. The next prime is 20507716417. The reversal of 20507716416 is 61461770502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507716417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550080 + ... + 586176.

Almost surely, 2^20507716416 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 20507716416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29707210080).

20507716416 is an abundant number, since it is smaller than the sum of its proper divisors (38906703744).

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

20507716416 is a wasteful number, since it uses less digits than its factorization.

20507716416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36392 (or 36382 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 20507716416 in words is "twenty billion, five hundred seven million, seven hundred sixteen thousand, four hundred sixteen".