20662265 has 16 divisors (see below), whose sum is σ = 26923008. Its totient is φ = 15132096.

The previous prime is 20662247. The next prime is 20662273. The reversal of 20662265 is 56226602.

It is a cyclic number.

It is not a de Polignac number, because 20662265 - 2⁸ = 20662009 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7004 + ... + 9506.

It is an arithmetic number, because the mean of its divisors is an integer number (1682688).

Almost surely, 2^20662265 is an apocalyptic number.

It is an amenable number.

20662265 is a deficient number, since it is larger than the sum of its proper divisors (6260743).

20662265 is a wasteful number, since it uses less digits than its factorization.

20662265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20662265 is about 4545.5764210934. The cubic root of 20662265 is about 274.4053929488.

Adding to 20662265 its reverse (56226602), we get a palindrome (76888867).

The spelling of 20662265 in words is "twenty million, six hundred sixty-two thousand, two hundred sixty-five".