20022111 has 6 divisors (see below), whose sum is σ = 28920840. Its totient is φ = 13348068.

The previous prime is 20022109. The next prime is 20022113. The reversal of 20022111 is 11122002.

It is an interprime number because it is at equal distance from previous prime (20022109) and next prime (20022113).

It is not a de Polignac number, because 20022111 - 2¹ = 20022109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2224679 = 20022111 / (2 + 0 + 0 + 2 + 2 + 1 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 20022093 and 20022102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022113) 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 5 ways as a sum of consecutive naturals, for example, 1112331 + ... + 1112348.

It is an arithmetic number, because the mean of its divisors is an integer number (4820140).

Almost surely, 2^20022111 is an apocalyptic number.

20022111 is a deficient number, since it is larger than the sum of its proper divisors (8898729).

20022111 is a wasteful number, since it uses less digits than its factorization.

20022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224685 (or 2224682 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20022111 is about 4474.6073570761. The cubic root of 20022111 is about 271.5417556323.

Adding to 20022111 its reverse (11122002), we get a palindrome (31144113).

The spelling of 20022111 in words is "twenty million, twenty-two thousand, one hundred eleven".