22045949 has 4 divisors (see below), whose sum is σ = 22407420. Its totient is φ = 21684480.

The previous prime is 22045943. The next prime is 22045963. The reversal of 22045949 is 94954022.

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 6285049 + 15760900 = 2507^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 22045949 - 2⁸ = 22045693 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 (22045943) 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, 180644 + ... + 180765.

It is an arithmetic number, because the mean of its divisors is an integer number (5601855).

Almost surely, 2^22045949 is an apocalyptic number.

It is an amenable number.

22045949 is a deficient number, since it is larger than the sum of its proper divisors (361471).

22045949 is an equidigital number, since it uses as much as digits as its factorization.

22045949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361470.

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

The square root of 22045949 is about 4695.3113847752. The cubic root of 22045949 is about 280.3988745399.

The spelling of 22045949 in words is "twenty-two million, forty-five thousand, nine hundred forty-nine".