22138995668 has 12 divisors (see below), whose sum is σ = 39098685780. Its totient is φ = 10967942592.

The previous prime is 22138995661. The next prime is 22138995689. The reversal of 22138995668 is 86659983122.

It can be written as a sum of positive squares in 2 ways, for example, as 7449070864 + 14689924804 = 86308^2 + 121202^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138995661) 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 3 ways as a sum of consecutive naturals, for example, 25388321 + ... + 25389192.

It is an arithmetic number, because the mean of its divisors is an integer number (3258223815).

Almost surely, 2^22138995668 is an apocalyptic number.

It is an amenable number.

22138995668 is a deficient number, since it is larger than the sum of its proper divisors (16959690112).

22138995668 is a wasteful number, since it uses less digits than its factorization.

22138995668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50777626 (or 50777624 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 59.

The spelling of 22138995668 in words is "twenty-two billion, one hundred thirty-eight million, nine hundred ninety-five thousand, six hundred sixty-eight".