20662266 has 16 divisors (see below), whose sum is σ = 41374944. Its totient is φ = 6879024.

The previous prime is 20662247. The next prime is 20662273. The reversal of 20662266 is 66226602.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5161 + ... + 8243.

It is an arithmetic number, because the mean of its divisors is an integer number (2585934).

Almost surely, 2^20662266 is an apocalyptic number.

20662266 is an abundant number, since it is smaller than the sum of its proper divisors (20712678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20662266 is a wasteful number, since it uses less digits than its factorization.

20662266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20662266 is about 4545.5765310904. The cubic root of 20662266 is about 274.4053973756.

Adding to 20662266 its reverse (66226602), we get a palindrome (86888868).

The spelling of 20662266 in words is "twenty million, six hundred sixty-two thousand, two hundred sixty-six".