22071668 has 24 divisors (see below), whose sum is σ = 40257000. Its totient is φ = 10575488.

The previous prime is 22071649. The next prime is 22071677. The reversal of 22071668 is 86617022.

It can be written as a sum of positive squares in 4 ways, for example, as 1532644 + 20539024 = 1238^2 + 4532^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16646 + ... + 17922.

It is an arithmetic number, because the mean of its divisors is an integer number (1677375).

Almost surely, 2^22071668 is an apocalyptic number.

It is an amenable number.

22071668 is a deficient number, since it is larger than the sum of its proper divisors (18185332).

22071668 is a wasteful number, since it uses less digits than its factorization.

22071668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 22071668 is about 4698.0493824565. The cubic root of 22071668 is about 280.5078707718.

The spelling of 22071668 in words is "twenty-two million, seventy-one thousand, six hundred sixty-eight".