20662285 has 16 divisors (see below), whose sum is σ = 28728576. Its totient is φ = 13972608.

The previous prime is 20662283. The next prime is 20662289. The reversal of 20662285 is 58226602.

It is a cyclic number.

It is not a de Polignac number, because 20662285 - 2¹ = 20662283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662283) 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 15 ways as a sum of consecutive naturals, for example, 1489 + ... + 6598.

It is an arithmetic number, because the mean of its divisors is an integer number (1795536).

Almost surely, 2^20662285 is an apocalyptic number.

It is an amenable number.

20662285 is a deficient number, since it is larger than the sum of its proper divisors (8066291).

20662285 is an equidigital number, since it uses as much as digits as its factorization.

20662285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20662285 is about 4545.5786210339. The cubic root of 20662285 is about 274.4054814855.

Adding to 20662285 its reverse (58226602), we get a palindrome (78888887).

The spelling of 20662285 in words is "twenty million, six hundred sixty-two thousand, two hundred eighty-five".