20404222 has 16 divisors (see below), whose sum is σ = 31307472. Its totient is φ = 9971200.

The previous prime is 20404213. The next prime is 20404249. The reversal of 20404222 is 22240402.

It is a junction number, because it is equal to n+sod(n) for n = 20404196 and 20404205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16158 + ... + 17374.

It is an arithmetic number, because the mean of its divisors is an integer number (1956717).

Almost surely, 2^20404222 is an apocalyptic number.

20404222 is a deficient number, since it is larger than the sum of its proper divisors (10903250).

20404222 is a wasteful number, since it uses less digits than its factorization.

20404222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20404222 is about 4517.1032753303. The cubic root of 20404222 is about 273.2582902589.

Adding to 20404222 its reverse (22240402), we get a palindrome (42644624).

The spelling of 20404222 in words is "twenty million, four hundred four thousand, two hundred twenty-two".