22065839 has 4 divisors (see below), whose sum is σ = 22826760. Its totient is φ = 21304920.

The previous prime is 22065829. The next prime is 22065863. The reversal of 22065839 is 93856022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22065839 - 2²⁴ = 5288623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22065799 and 22065808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22065829) 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 3 ways as a sum of consecutive naturals, for example, 380417 + ... + 380474.

It is an arithmetic number, because the mean of its divisors is an integer number (5706690).

Almost surely, 2^22065839 is an apocalyptic number.

22065839 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

22065839 is a deficient number, since it is larger than the sum of its proper divisors (760921).

22065839 is an equidigital number, since it uses as much as digits as its factorization.

22065839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760920.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 22065839 is about 4697.4289776430. The cubic root of 22065839 is about 280.4831750950.

The spelling of 22065839 in words is "twenty-two million, sixty-five thousand, eight hundred thirty-nine".