20660006 has 24 divisors (see below), whose sum is σ = 32735664. Its totient is φ = 9776480.

The previous prime is 20659999. The next prime is 20660047. The reversal of 20660006 is 60006602.

It is a self number, because there is not a number n which added to its sum of digits gives 20660006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119336 + ... + 119508.

It is an arithmetic number, because the mean of its divisors is an integer number (1363986).

Almost surely, 2^20660006 is an apocalyptic number.

20660006 is a deficient number, since it is larger than the sum of its proper divisors (12075658).

20660006 is a wasteful number, since it uses less digits than its factorization.

20660006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20660006 is about 4545.3279309638. The cubic root of 20660006 is about 274.3953923612.

Adding to 20660006 its reverse (60006602), we get a palindrome (80666608).

The spelling of 20660006 in words is "twenty million, six hundred sixty thousand, six".