20611066 has 12 divisors (see below), whose sum is σ = 35964378. Its totient is φ = 8833272.

The previous prime is 20611057. The next prime is 20611079. The reversal of 20611066 is 66011602.

It can be written as a sum of positive squares in only one way, i.e., 20511841 + 99225 = 4529^2 + 315^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105061 + ... + 105256.

Almost surely, 2^20611066 is an apocalyptic number.

20611066 is a deficient number, since it is larger than the sum of its proper divisors (15353312).

20611066 is a wasteful number, since it uses less digits than its factorization.

20611066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210333 (or 210326 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20611066 is about 4539.9411890464. The cubic root of 20611066 is about 274.1785558951.

Adding to 20611066 its reverse (66011602), we get a palindrome (86622668).

The spelling of 20611066 in words is "twenty million, six hundred eleven thousand, sixty-six".