22140042 has 16 divisors (see below), whose sum is σ = 44507232. Its totient is φ = 7342160.

The previous prime is 22140029. The next prime is 22140047. The reversal of 22140042 is 24004122.

It is not an unprimeable number, because it can be changed into a prime (22140047) 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 7 ways as a sum of consecutive naturals, for example, 8184 + ... + 10547.

It is an arithmetic number, because the mean of its divisors is an integer number (2781702).

Almost surely, 2^22140042 is an apocalyptic number.

22140042 is an abundant number, since it is smaller than the sum of its proper divisors (22367190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22140042 is a wasteful number, since it uses less digits than its factorization.

22140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18933.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22140042 is about 4705.3206054423. The cubic root of 22140042 is about 280.7972262532.

Adding to 22140042 its reverse (24004122), we get a palindrome (46144164).

The spelling of 22140042 in words is "twenty-two million, one hundred forty thousand, forty-two".