20624222 has 16 divisors (see below), whose sum is σ = 31899744. Its totient is φ = 9996000.

The previous prime is 20624209. The next prime is 20624239. The reversal of 20624222 is 22242602.

It is a junction number, because it is equal to n+sod(n) for n = 20624194 and 20624203.

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, 7472 + ... + 9852.

It is an arithmetic number, because the mean of its divisors is an integer number (1993734).

Almost surely, 2^20624222 is an apocalyptic number.

20624222 is a deficient number, since it is larger than the sum of its proper divisors (11275522).

20624222 is a wasteful number, since it uses less digits than its factorization.

20624222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20624222 is about 4541.3898753575. The cubic root of 20624222 is about 274.2368793524.

Adding to 20624222 its reverse (22242602), we get a palindrome (42866824).

The spelling of 20624222 in words is "twenty million, six hundred twenty-four thousand, two hundred twenty-two".