20612222 has 16 divisors (see below), whose sum is σ = 32004720. Its totient is φ = 9949632.

The previous prime is 20612203. The next prime is 20612231. The reversal of 20612222 is 22221602.

It is a self number, because there is not a number n which added to its sum of digits gives 20612222.

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, 6308 + ... + 9000.

It is an arithmetic number, because the mean of its divisors is an integer number (2000295).

Almost surely, 2^20612222 is an apocalyptic number.

20612222 is a deficient number, since it is larger than the sum of its proper divisors (11392498).

20612222 is a wasteful number, since it uses less digits than its factorization.

20612222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20612222 is about 4540.0685016859. The cubic root of 20612222 is about 274.1836816931.

Adding to 20612222 its reverse (22221602), we get a palindrome (42833824).

The spelling of 20612222 in words is "twenty million, six hundred twelve thousand, two hundred twenty-two".