20221404 has 48 divisors (see below), whose sum is σ = 54743808. Its totient is φ = 5689728.

The previous prime is 20221403. The next prime is 20221427. The reversal of 20221404 is 40412202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221403) 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 15 ways as a sum of consecutive naturals, for example, 3832 + ... + 7424.

It is an arithmetic number, because the mean of its divisors is an integer number (1140496).

Almost surely, 2^20221404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20221404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27371904).

20221404 is an abundant number, since it is smaller than the sum of its proper divisors (34522404).

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

20221404 is a wasteful number, since it uses less digits than its factorization.

20221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674 (or 3672 counting only the distinct ones).

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

The square root of 20221404 is about 4496.8215441576. The cubic root of 20221404 is about 272.4397263095.

Adding to 20221404 its reverse (40412202), we get a palindrome (60633606).

The spelling of 20221404 in words is "twenty million, two hundred twenty-one thousand, four hundred four".