20522222 has 16 divisors (see below), whose sum is σ = 36040032. Its totient is φ = 8580480.

The previous prime is 20522219. The next prime is 20522239. The reversal of 20522222 is 22222502.

It is a happy number.

20522222 is a modest number, since divided by 2222 gives 2052 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20522222.

It is a congruent number.

It is an unprimeable number.

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, 17303 + ... + 18450.

It is an arithmetic number, because the mean of its divisors is an integer number (2252502).

Almost surely, 2^20522222 is an apocalyptic number.

20522222 is a deficient number, since it is larger than the sum of its proper divisors (15517810).

20522222 is a wasteful number, since it uses less digits than its factorization.

20522222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35803.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20522222 is about 4530.1459137648. The cubic root of 20522222 is about 273.7840396083.

Adding to 20522222 its reverse (22222502), we get a palindrome (42744724).

The spelling of 20522222 in words is "twenty million, five hundred twenty-two thousand, two hundred twenty-two".