20223111 has 4 divisors (see below), whose sum is σ = 26964152. Its totient is φ = 13482072.

The previous prime is 20223109. The next prime is 20223139. The reversal of 20223111 is 11132202.

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

It is not a de Polignac number, because 20223111 - 2¹ = 20223109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223101) 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, 3370516 + ... + 3370521.

It is an arithmetic number, because the mean of its divisors is an integer number (6741038).

Almost surely, 2^20223111 is an apocalyptic number.

20223111 is a deficient number, since it is larger than the sum of its proper divisors (6741041).

20223111 is an equidigital number, since it uses as much as digits as its factorization.

20223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6741040.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20223111 is about 4497.0113408796. The cubic root of 20223111 is about 272.4473921394.

Adding to 20223111 its reverse (11132202), we get a palindrome (31355313).

Subtracting from 20223111 its reverse (11132202), we obtain a palindrome (9090909).

The spelling of 20223111 in words is "twenty million, two hundred twenty-three thousand, one hundred eleven".