22218406761 has 8 divisors (see below), whose sum is σ = 29912159680. Its totient is φ = 14668462512.

The previous prime is 22218406759. The next prime is 22218406787. The reversal of 22218406761 is 16760481222.

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

It is not a de Polignac number, because 22218406761 - 2¹ = 22218406759 is a prime.

It is a super-2 number, since 2×22218406761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22218406711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35951806 + ... + 35952423.

It is an arithmetic number, because the mean of its divisors is an integer number (3739019960).

Almost surely, 2^22218406761 is an apocalyptic number.

It is an amenable number.

22218406761 is a deficient number, since it is larger than the sum of its proper divisors (7693752919).

22218406761 is a wasteful number, since it uses less digits than its factorization.

22218406761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71904335.

The product of its (nonzero) digits is 64512, while the sum is 39.

Adding to 22218406761 its reverse (16760481222), we get a palindrome (38978887983).

The spelling of 22218406761 in words is "twenty-two billion, two hundred eighteen million, four hundred six thousand, seven hundred sixty-one".