22492809 has 24 divisors (see below), whose sum is σ = 33971392. Its totient is φ = 14871600.

The previous prime is 22492787. The next prime is 22492817. The reversal of 22492809 is 90829422.

It is not a de Polignac number, because 22492809 - 2⁷ = 22492681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22492849) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 36387 + ... + 36999.

Almost surely, 2^22492809 is an apocalyptic number.

It is an amenable number.

22492809 is a deficient number, since it is larger than the sum of its proper divisors (11478583).

22492809 is an equidigital number, since it uses as much as digits as its factorization.

22492809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 22492809 is about 4742.6584317237. The cubic root of 22492809 is about 282.2807299482.

The spelling of 22492809 in words is "twenty-two million, four hundred ninety-two thousand, eight hundred nine".