20608166 has 4 divisors (see below), whose sum is σ = 30912252. Its totient is φ = 10304082.

The previous prime is 20608139. The next prime is 20608187. The reversal of 20608166 is 66180602.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5152040 + ... + 5152043.

It is an arithmetic number, because the mean of its divisors is an integer number (7728063).

Almost surely, 2^20608166 is an apocalyptic number.

20608166 is a deficient number, since it is larger than the sum of its proper divisors (10304086).

20608166 is a wasteful number, since it uses less digits than its factorization.

20608166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10304085.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20608166 is about 4539.6217904138. The cubic root of 20608166 is about 274.1656962156.

Adding to 20608166 its reverse (66180602), we get a palindrome (86788768).

The spelling of 20608166 in words is "twenty million, six hundred eight thousand, one hundred sixty-six".