20442111 has 4 divisors (see below), whose sum is σ = 27256152. Its totient is φ = 13628072.

The previous prime is 20442091. The next prime is 20442127. The reversal of 20442111 is 11124402.

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 20442111 - 2⁷ = 20441983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442151) 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, 3407016 + ... + 3407021.

It is an arithmetic number, because the mean of its divisors is an integer number (6814038).

Almost surely, 2^20442111 is an apocalyptic number.

20442111 is a deficient number, since it is larger than the sum of its proper divisors (6814041).

20442111 is an equidigital number, since it uses as much as digits as its factorization.

20442111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814040.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 20442111 is about 4521.2952790102. The cubic root of 20442111 is about 273.4273252334.

Adding to 20442111 its reverse (11124402), we get a palindrome (31566513).

The spelling of 20442111 in words is "twenty million, four hundred forty-two thousand, one hundred eleven".