20611065 has 16 divisors (see below), whose sum is σ = 33350400. Its totient is φ = 10868352.

The previous prime is 20611057. The next prime is 20611079. The reversal of 20611065 is 56011602.

It is a happy number.

It is not a de Polignac number, because 20611065 - 2³ = 20611057 is a prime.

It is a Curzon 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, 6385 + ... + 9054.

It is an arithmetic number, because the mean of its divisors is an integer number (2084400).

Almost surely, 2^20611065 is an apocalyptic number.

It is an amenable number.

20611065 is a deficient number, since it is larger than the sum of its proper divisors (12739335).

20611065 is a wasteful number, since it uses less digits than its factorization.

20611065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15536.

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

The square root of 20611065 is about 4539.9410789128. The cubic root of 20611065 is about 274.1785514609.

Adding to 20611065 its reverse (56011602), we get a palindrome (76622667).

The spelling of 20611065 in words is "twenty million, six hundred eleven thousand, sixty-five".