20660195 has 12 divisors (see below), whose sum is σ = 25286016. Its totient is φ = 16205280.

The previous prime is 20660183. The next prime is 20660197. The reversal of 20660195 is 59106602.

It is not a de Polignac number, because 20660195 - 2¹⁶ = 20594659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20660197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13310 + ... + 14780.

It is an arithmetic number, because the mean of its divisors is an integer number (2107168).

Almost surely, 2^20660195 is an apocalyptic number.

20660195 is a deficient number, since it is larger than the sum of its proper divisors (4625821).

20660195 is an equidigital number, since it uses as much as digits as its factorization.

20660195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20660195 is about 4545.3487214954. The cubic root of 20660195 is about 274.3962290916.

Adding to 20660195 its reverse (59106602), we get a palindrome (79766797).

The spelling of 20660195 in words is "twenty million, six hundred sixty thousand, one hundred ninety-five".