20065471504 has 80 divisors (see below), whose sum is σ = 43372067760. Its totient is φ = 8933253120.

The previous prime is 20065471499. The next prime is 20065471513. The reversal of 20065471504 is 40517456002.

It can be written as a sum of positive squares in 8 ways, for example, as 3974041600 + 16091429904 = 63040^2 + 126852^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20065471504.

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, 745774 + ... + 772210.

It is an arithmetic number, because the mean of its divisors is an integer number (542150847).

Almost surely, 2^20065471504 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 20065471504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21686033880).

20065471504 is an abundant number, since it is smaller than the sum of its proper divisors (23306596256).

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

20065471504 is a wasteful number, since it uses less digits than its factorization.

20065471504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26588 (or 26582 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 20065471504 in words is "twenty billion, sixty-five million, four hundred seventy-one thousand, five hundred four".