20605222 has 16 divisors (see below), whose sum is σ = 33795072. Its totient is φ = 9344520.

The previous prime is 20605201. The next prime is 20605229. The reversal of 20605222 is 22250602.

It is a self number, because there is not a number n which added to its sum of digits gives 20605222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12583 + ... + 14125.

It is an arithmetic number, because the mean of its divisors is an integer number (2112192).

Almost surely, 2^20605222 is an apocalyptic number.

20605222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20605222 is a deficient number, since it is larger than the sum of its proper divisors (13189850).

20605222 is a wasteful number, since it uses less digits than its factorization.

20605222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20605222 is about 4539.2975227451. The cubic root of 20605222 is about 274.1526401897.

Adding to 20605222 its reverse (22250602), we get a palindrome (42855824).

The spelling of 20605222 in words is "twenty million, six hundred five thousand, two hundred twenty-two".