20002211 has 4 divisors (see below), whose sum is σ = 20029392. Its totient is φ = 19975032.

The previous prime is 20002201. The next prime is 20002261. The reversal of 20002211 is 11220002.

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 20002211 - 2¹⁸ = 19740067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12455 + ... + 13968.

It is an arithmetic number, because the mean of its divisors is an integer number (5007348).

Almost surely, 2^20002211 is an apocalyptic number.

20002211 is a deficient number, since it is larger than the sum of its proper divisors (27181).

20002211 is an equidigital number, since it uses as much as digits as its factorization.

20002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27180.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20002211 is about 4472.3831454830. The cubic root of 20002211 is about 271.4517639198.

Adding to 20002211 its reverse (11220002), we get a palindrome (31222213).

The spelling of 20002211 in words is "twenty million, two thousand, two hundred eleven".