22440020 has 12 divisors (see below), whose sum is σ = 47124084. Its totient is φ = 8976000.

The previous prime is 22439999. The next prime is 22440031. The reversal of 22440020 is 2004422.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14122564 + 8317456 = 3758^2 + 2884^2 .

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22439977 and 22440004.

It is a congruent number.

It is an unprimeable number.

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, 560981 + ... + 561020.

It is an arithmetic number, because the mean of its divisors is an integer number (3927007).

Almost surely, 2^22440020 is an apocalyptic number.

22440020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22440020 is an abundant number, since it is smaller than the sum of its proper divisors (24684064).

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

22440020 is a wasteful number, since it uses less digits than its factorization.

22440020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122010 (or 1122008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22440020 is about 4737.0898239320. The cubic root of 22440020 is about 282.0597261285.

Adding to 22440020 its reverse (2004422), we get a palindrome (24444442).

The spelling of 22440020 in words is "twenty-two million, four hundred forty thousand, twenty".