20266011 has 16 divisors (see below), whose sum is σ = 30105600. Its totient is φ = 13473864.

The previous prime is 20266007. The next prime is 20266039. The reversal of 20266011 is 11066202.

It is a happy number.

20266011 is a `hidden beast` number, since 2 + 0 + 2 + 660 + 1 + 1 = 666.

It is not a de Polignac number, because 20266011 - 2² = 20266007 is a prime.

It is a super-2 number, since 2×20266011² = 821422403704242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20266111) 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 15 ways as a sum of consecutive naturals, for example, 12150 + ... + 13716.

It is an arithmetic number, because the mean of its divisors is an integer number (1881600).

Almost surely, 2^20266011 is an apocalyptic number.

20266011 is a deficient number, since it is larger than the sum of its proper divisors (9839589).

20266011 is a wasteful number, since it uses less digits than its factorization.

20266011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055 (or 2049 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20266011 is about 4501.7786484899. The cubic root of 20266011 is about 272.6399068342.

The spelling of 20266011 in words is "twenty million, two hundred sixty-six thousand, eleven".