22004140 has 24 divisors (see below), whose sum is σ = 46901232. Its totient is φ = 8669760.

The previous prime is 22004119. The next prime is 22004149. The reversal of 22004140 is 4140022.

It is a self number, because there is not a number n which added to its sum of digits gives 22004140.

It is not an unprimeable number, because it can be changed into a prime (22004149) 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 7 ways as a sum of consecutive naturals, for example, 6871 + ... + 9550.

It is an arithmetic number, because the mean of its divisors is an integer number (1954218).

Almost surely, 2^22004140 is an apocalyptic number.

22004140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22004140 is an abundant number, since it is smaller than the sum of its proper divisors (24897092).

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

22004140 is a wasteful number, since it uses less digits than its factorization.

22004140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16497 (or 16495 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22004140 is about 4690.8570645459. The cubic root of 22004140 is about 280.2215083917.

Adding to 22004140 its reverse (4140022), we get a palindrome (26144162).

The spelling of 22004140 in words is "twenty-two million, four thousand, one hundred forty".