20711066 has 8 divisors (see below), whose sum is σ = 32894100. Its totient is φ = 9746368.

The previous prime is 20711059. The next prime is 20711077. The reversal of 20711066 is 66011702.

It can be written as a sum of positive squares in 2 ways, for example, as 18966025 + 1745041 = 4355^2 + 1321^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304541 + ... + 304608.

Almost surely, 2^20711066 is an apocalyptic number.

20711066 is a deficient number, since it is larger than the sum of its proper divisors (12183034).

20711066 is a wasteful number, since it uses less digits than its factorization.

20711066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609168.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20711066 is about 4550.9412213299. The cubic root of 20711066 is about 274.6212571295.

Adding to 20711066 its reverse (66011702), we get a palindrome (86722768).

The spelling of 20711066 in words is "twenty million, seven hundred eleven thousand, sixty-six".