20500446065 has 16 divisors (see below), whose sum is σ = 26888495616. Its totient is φ = 14880777600.

The previous prime is 20500446061. The next prime is 20500446079. The reversal of 20500446065 is 56064400502.

It is not a de Polignac number, because 20500446065 - 2² = 20500446061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20500446061) 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, 329057 + ... + 386366.

It is an arithmetic number, because the mean of its divisors is an integer number (1680530976).

Almost surely, 2^20500446065 is an apocalyptic number.

It is an amenable number.

20500446065 is a deficient number, since it is larger than the sum of its proper divisors (6388049551).

20500446065 is a wasteful number, since it uses less digits than its factorization.

20500446065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715960.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 20500446065 its reverse (56064400502), we get a palindrome (76564846567).

The spelling of 20500446065 in words is "twenty billion, five hundred million, four hundred forty-six thousand, sixty-five".