20662245 has 24 divisors (see below), whose sum is σ = 35942400. Its totient is φ = 10980576.

The previous prime is 20662241. The next prime is 20662247. The reversal of 20662245 is 54226602.

It is not a de Polignac number, because 20662245 - 2² = 20662241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15516 + ... + 16794.

It is an arithmetic number, because the mean of its divisors is an integer number (1497600).

Almost surely, 2^20662245 is an apocalyptic number.

It is an amenable number.

20662245 is a deficient number, since it is larger than the sum of its proper divisors (15280155).

20662245 is a wasteful number, since it uses less digits than its factorization.

20662245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20662245 is about 4545.5742211518. The cubic root of 20662245 is about 274.4053044120.

Adding to 20662245 its reverse (54226602), we get a palindrome (74888847).

The spelling of 20662245 in words is "twenty million, six hundred sixty-two thousand, two hundred forty-five".