22009999 has 16 divisors (see below), whose sum is σ = 25764480. Its totient is φ = 18588960.

The previous prime is 22009991. The next prime is 22010003. The reversal of 22009999 is 99990022.

It is a cyclic number.

It is not a de Polignac number, because 22009999 - 2³ = 22009991 is a prime.

It is a Duffinian number.

22009999 is a modest number, since divided by 9999 gives 2200 as remainder.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22009991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10084 + ... + 12070.

It is an arithmetic number, because the mean of its divisors is an integer number (1610280).

Almost surely, 2^22009999 is an apocalyptic number.

22009999 is a deficient number, since it is larger than the sum of its proper divisors (3754481).

22009999 is a wasteful number, since it uses less digits than its factorization.

22009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 22009999 is about 4691.4815357198. The cubic root of 22009999 is about 280.2463775317.

The spelling of 22009999 in words is "twenty-two million, nine thousand, nine hundred ninety-nine".