20660116 has 12 divisors (see below), whose sum is σ = 36308160. Its totient is φ = 10286360.

The previous prime is 20660099. The next prime is 20660137. The reversal of 20660116 is 61106602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9850 + ... + 11761.

It is an arithmetic number, because the mean of its divisors is an integer number (3025680).

Almost surely, 2^20660116 is an apocalyptic number.

It is an amenable number.

20660116 is a deficient number, since it is larger than the sum of its proper divisors (15648044).

20660116 is a wasteful number, since it uses less digits than its factorization.

20660116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21854 (or 21852 counting only the distinct ones).

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

The square root of 20660116 is about 4545.3400312848. The cubic root of 20660116 is about 274.3958793478.

Adding to 20660116 its reverse (61106602), we get a palindrome (81766718).

The spelling of 20660116 in words is "twenty million, six hundred sixty thousand, one hundred sixteen".