22218885805 has 8 divisors (see below), whose sum is σ = 26663995800. Its totient is φ = 17774220096.

The previous prime is 22218885803. The next prime is 22218885809. The reversal of 22218885805 is 50858881222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6533327241 + 15685558564 = 80829^2 + 125242^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22218885805 - 2¹ = 22218885803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22218885803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11191 + ... + 211099.

It is an arithmetic number, because the mean of its divisors is an integer number (3332999475).

Almost surely, 2^22218885805 is an apocalyptic number.

It is an amenable number.

22218885805 is a deficient number, since it is larger than the sum of its proper divisors (4445109995).

22218885805 is a wasteful number, since it uses less digits than its factorization.

22218885805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222143.

The product of its (nonzero) digits is 819200, while the sum is 49.

The spelling of 22218885805 in words is "twenty-two billion, two hundred eighteen million, eight hundred eighty-five thousand, eight hundred five".