20601165 has 32 divisors (see below), whose sum is σ = 36731520. Its totient is φ = 9789696.

The previous prime is 20601157. The next prime is 20601167. The reversal of 20601165 is 56110602.

It is a happy number.

It is not a de Polignac number, because 20601165 - 2³ = 20601157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3834 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (1147860).

Almost surely, 2^20601165 is an apocalyptic number.

It is an amenable number.

20601165 is a deficient number, since it is larger than the sum of its proper divisors (16130355).

20601165 is a wasteful number, since it uses less digits than its factorization.

20601165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20601165 is about 4538.8506254337. The cubic root of 20601165 is about 274.1346462031.

Adding to 20601165 its reverse (56110602), we get a palindrome (76711767).

The spelling of 20601165 in words is "twenty million, six hundred one thousand, one hundred sixty-five".