22020404 has 18 divisors (see below), whose sum is σ = 44827650. Its totient is φ = 9437232.

The previous prime is 22020391. The next prime is 22020409. The reversal of 22020404 is 40402022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 1317904 = 4550^2 + 1148^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55979 + ... + 56370.

It is an arithmetic number, because the mean of its divisors is an integer number (2490425).

Almost surely, 2^22020404 is an apocalyptic number.

It is an amenable number.

22020404 is an abundant number, since it is smaller than the sum of its proper divisors (22807246).

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

22020404 is a wasteful number, since it uses less digits than its factorization.

22020404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112367 (or 112358 counting only the distinct ones).

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

The square root of 22020404 is about 4692.5903294449. The cubic root of 22020404 is about 280.2905317694.

Adding to 22020404 its reverse (40402022), we get a palindrome (62422426).

The spelling of 22020404 in words is "twenty-two million, twenty thousand, four hundred four".