22118585 has 4 divisors (see below), whose sum is σ = 26542308. Its totient is φ = 17694864.

The previous prime is 22118567. The next prime is 22118599. The reversal of 22118585 is 58581122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58581122 = 2 ⋅29290561.

It can be written as a sum of positive squares in 2 ways, for example, as 11182336 + 10936249 = 3344^2 + 3307^2 .

It is a cyclic number.

It is not a de Polignac number, because 22118585 - 2²⁰ = 21070009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211854 + ... + 2211863.

It is an arithmetic number, because the mean of its divisors is an integer number (6635577).

Almost surely, 2^22118585 is an apocalyptic number.

It is an amenable number.

22118585 is a deficient number, since it is larger than the sum of its proper divisors (4423723).

22118585 is an equidigital number, since it uses as much as digits as its factorization.

22118585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423722.

The product of its digits is 6400, while the sum is 32.

The square root of 22118585 is about 4703.0399743145. The cubic root of 22118585 is about 280.7064854810.

The spelling of 22118585 in words is "twenty-two million, one hundred eighteen thousand, five hundred eighty-five".