20076780568 has 64 divisors (see below), whose sum is σ = 41558832000. Its totient is φ = 9034747392.

The previous prime is 20076780557. The next prime is 20076780571. The reversal of 20076780568 is 86508767002.

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, 1307238 + ... + 1322506.

It is an arithmetic number, because the mean of its divisors is an integer number (649356750).

Almost surely, 2^20076780568 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 20076780568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20779416000).

20076780568 is an abundant number, since it is smaller than the sum of its proper divisors (21482051432).

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

20076780568 is a wasteful number, since it uses less digits than its factorization.

20076780568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15604 (or 15600 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 20076780568 in words is "twenty billion, seventy-six million, seven hundred eighty thousand, five hundred sixty-eight".