22004005 has 4 divisors (see below), whose sum is σ = 26404812. Its totient is φ = 17603200.

The previous prime is 22003979. The next prime is 22004009. The reversal of 22004005 is 50040022.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5013121 + 16990884 = 2239^2 + 4122^2 .

It is not a de Polignac number, because 22004005 - 2⁵ = 22003973 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 (22004009) 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, 2200396 + ... + 2200405.

It is an arithmetic number, because the mean of its divisors is an integer number (6601203).

Almost surely, 2^22004005 is an apocalyptic number.

It is an amenable number.

22004005 is a deficient number, since it is larger than the sum of its proper divisors (4400807).

22004005 is an equidigital number, since it uses as much as digits as its factorization.

22004005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400806.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22004005 is about 4690.8426748293. The cubic root of 22004005 is about 280.2209353180.

Adding to 22004005 its reverse (50040022), we get a palindrome (72044027).

The spelling of 22004005 in words is "twenty-two million, four thousand, five".