22108418642 has 18 divisors (see below), whose sum is σ = 33898381797. Its totient is φ = 10814176984.

The previous prime is 22108418611. The next prime is 22108418659. The reversal of 22108418642 is 24681480122.

It can be written as a sum of positive squares in 2 ways, for example, as 19973886241 + 2134532401 = 141329^2 + 46201^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105139.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22108418596 and 22108418605.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9881948 + ... + 9884184.

Almost surely, 2^22108418642 is an apocalyptic number.

22108418642 is a deficient number, since it is larger than the sum of its proper divisors (11789963155).

22108418642 is an frugal number, since it uses more digits than its factorization.

22108418642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

Adding to 22108418642 its reverse (24681480122), we get a palindrome (46789898764).

The spelling of 22108418642 in words is "twenty-two billion, one hundred eight million, four hundred eighteen thousand, six hundred forty-two".