22131668 has 12 divisors (see below), whose sum is σ = 41709780. Its totient is φ = 10214592.

The previous prime is 22131649. The next prime is 22131673. The reversal of 22131668 is 86613122.

It can be written as a sum of positive squares in 2 ways, for example, as 8456464 + 13675204 = 2908^2 + 3698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22131668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212753 + ... + 212856.

It is an arithmetic number, because the mean of its divisors is an integer number (3475815).

Almost surely, 2^22131668 is an apocalyptic number.

It is an amenable number.

22131668 is a deficient number, since it is larger than the sum of its proper divisors (19578112).

22131668 is a wasteful number, since it uses less digits than its factorization.

22131668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425626 (or 425624 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 22131668 is about 4704.4306775634. The cubic root of 22131668 is about 280.7618199294.

The spelling of 22131668 in words is "twenty-two million, one hundred thirty-one thousand, six hundred sixty-eight".