22085909 has 4 divisors (see below), whose sum is σ = 22139040. Its totient is φ = 22032780.

The previous prime is 22085897. The next prime is 22085933. The reversal of 22085909 is 90958022.

22085909 is nontrivially palindromic in base 2 and base 4.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90958022 = 2 ⋅45479011.

It is a cyclic number.

It is not a de Polignac number, because 22085909 - 2⁴ = 22085893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22085939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25937 + ... + 26774.

It is an arithmetic number, because the mean of its divisors is an integer number (5534760).

Almost surely, 2^22085909 is an apocalyptic number.

It is an amenable number.

22085909 is a deficient number, since it is larger than the sum of its proper divisors (53131).

22085909 is an equidigital number, since it uses as much as digits as its factorization.

22085909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53130.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 22085909 is about 4699.5647670822. The cubic root of 22085909 is about 280.5681872182.

The spelling of 22085909 in words is "twenty-two million, eighty-five thousand, nine hundred nine".