20002266 has 24 divisors (see below), whose sum is σ = 44051124. Its totient is φ = 6557760.

The previous prime is 20002261. The next prime is 20002313. The reversal of 20002266 is 66220002.

It can be written as a sum of positive squares in 2 ways, for example, as 16281225 + 3721041 = 4035^2 + 1929^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20002261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8011 + ... + 10206.

Almost surely, 2^20002266 is an apocalyptic number.

20002266 is an abundant number, since it is smaller than the sum of its proper divisors (24048858).

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

20002266 is a wasteful number, since it uses less digits than its factorization.

20002266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18286 (or 18283 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20002266 is about 4472.3892943258. The cubic root of 20002266 is about 271.4520127229.

Adding to 20002266 its reverse (66220002), we get a palindrome (86222268).

The spelling of 20002266 in words is "twenty million, two thousand, two hundred sixty-six".