20669606 has 32 divisors (see below), whose sum is σ = 34209120. Its totient is φ = 9331200.

The previous prime is 20669563. The next prime is 20669611. The reversal of 20669606 is 60696602.

It is a super-2 number, since 2×20669606² = 854465224390472, which contains 22 as substring.

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 in 15 ways as a sum of consecutive naturals, for example, 85646 + ... + 85886.

It is an arithmetic number, because the mean of its divisors is an integer number (1069035).

Almost surely, 2^20669606 is an apocalyptic number.

20669606 is a deficient number, since it is larger than the sum of its proper divisors (13539514).

20669606 is a wasteful number, since it uses less digits than its factorization.

20669606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 20669606 is about 4546.3838377330. The cubic root of 20669606 is about 274.4378865060.

The spelling of 20669606 in words is "twenty million, six hundred sixty-nine thousand, six hundred six".