20660302 has 16 divisors (see below), whose sum is σ = 34826400. Its totient is φ = 9120672.

The previous prime is 20660261. The next prime is 20660303. The reversal of 20660302 is 20306602.

It is a self number, because there is not a number n which added to its sum of digits gives 20660302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16677 + ... + 17872.

It is an arithmetic number, because the mean of its divisors is an integer number (2176650).

Almost surely, 2^20660302 is an apocalyptic number.

20660302 is a deficient number, since it is larger than the sum of its proper divisors (14166098).

20660302 is a wasteful number, since it uses less digits than its factorization.

20660302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34587.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20660302 is about 4545.3604917542. The cubic root of 20660302 is about 274.3967027940.

Adding to 20660302 its reverse (20306602), we get a palindrome (40966904).

The spelling of 20660302 in words is "twenty million, six hundred sixty thousand, three hundred two".