18222822 has 12 divisors (see below), whose sum is σ = 39482820. Its totient is φ = 6074268.

The previous prime is 18222811. The next prime is 18222829. The reversal of 18222822 is 22822281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506172 + ... + 506207.

It is an arithmetic number, because the mean of its divisors is an integer number (3290235).

Almost surely, 2^18222822 is an apocalyptic number.

18222822 is an abundant number, since it is smaller than the sum of its proper divisors (21259998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18222822 is a wasteful number, since it uses less digits than its factorization.

18222822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012387 (or 1012384 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 18222822 is about 4268.8197432077. The cubic root of 18222822 is about 263.1511128765.

It can be divided in two parts, 18222 and 822, that added together give a square (19044 = 138²).

The spelling of 18222822 in words is "eighteen million, two hundred twenty-two thousand, eight hundred twenty-two".