20002011 has 4 divisors (see below), whose sum is σ = 26669352. Its totient is φ = 13334672.

The previous prime is 20002007. The next prime is 20002027. The reversal of 20002011 is 11020002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20002011 - 2² = 20002007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20002061) 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 3 ways as a sum of consecutive naturals, for example, 3333666 + ... + 3333671.

It is an arithmetic number, because the mean of its divisors is an integer number (6667338).

Almost surely, 2^20002011 is an apocalyptic number.

20002011 is a deficient number, since it is larger than the sum of its proper divisors (6667341).

20002011 is an equidigital number, since it uses as much as digits as its factorization.

20002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667340.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20002011 is about 4472.3607859832. The cubic root of 20002011 is about 271.4508591776.

Adding to 20002011 its reverse (11020002), we get a palindrome (31022013).

Subtracting from 20002011 its reverse (11020002), we obtain a square (8982009 = 2997²).

The spelling of 20002011 in words is "twenty million, two thousand, eleven".