20022211 has 4 divisors (see below), whose sum is σ = 21842424. Its totient is φ = 18202000.

The previous prime is 20022203. The next prime is 20022229. The reversal of 20022211 is 11222002.

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 20022211 - 2³ = 20022203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910090 + ... + 910111.

It is an arithmetic number, because the mean of its divisors is an integer number (5460606).

Almost surely, 2^20022211 is an apocalyptic number.

20022211 is a deficient number, since it is larger than the sum of its proper divisors (1820213).

20022211 is a wasteful number, since it uses less digits than its factorization.

20022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820212.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20022211 is about 4474.6185312270. The cubic root of 20022211 is about 271.5422077013.

Adding to 20022211 its reverse (11222002), we get a palindrome (31244213).

The spelling of 20022211 in words is "twenty million, twenty-two thousand, two hundred eleven".