22189405 has 36 divisors (see below), whose sum is σ = 32419548. Its totient is φ = 14528640.

The previous prime is 22189373. The next prime is 22189423. The reversal of 22189405 is 50498122.

It can be written as a sum of positive squares in 2 ways, for example, as 3896676 + 18292729 = 1974^2 + 4277^2 .

It is not a de Polignac number, because 22189405 - 2⁵ = 22189373 is a prime.

It is a nialpdrome in base 12.

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 35 ways as a sum of consecutive naturals, for example, 472092 + ... + 472138.

It is an arithmetic number, because the mean of its divisors is an integer number (900543).

Almost surely, 2^22189405 is an apocalyptic number.

It is an amenable number.

22189405 is a deficient number, since it is larger than the sum of its proper divisors (10230143).

22189405 is an equidigital number, since it uses as much as digits as its factorization.

22189405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 22189405 is about 4710.5631298179. The cubic root of 22189405 is about 281.0057579989.

The spelling of 22189405 in words is "twenty-two million, one hundred eighty-nine thousand, four hundred five".