20653065 has 12 divisors (see below), whose sum is σ = 35798724. Its totient is φ = 11014944.

The previous prime is 20653063. The next prime is 20653081. The reversal of 20653065 is 56035602.

20653065 is a `hidden beast` number, since 2 + 0 + 653 + 0 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8874441 + 11778624 = 2979^2 + 3432^2 .

It is not a de Polignac number, because 20653065 - 2¹ = 20653063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20653063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229434 + ... + 229523.

It is an arithmetic number, because the mean of its divisors is an integer number (2983227).

Almost surely, 2^20653065 is an apocalyptic number.

It is an amenable number.

20653065 is a deficient number, since it is larger than the sum of its proper divisors (15145659).

20653065 is a wasteful number, since it uses less digits than its factorization.

20653065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458968 (or 458965 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 20653065 is about 4544.5643355552. The cubic root of 20653065 is about 274.3646600089.

Adding to 20653065 its reverse (56035602), we get a palindrome (76688667).

The spelling of 20653065 in words is "twenty million, six hundred fifty-three thousand, sixty-five".