22043764 has 18 divisors (see below), whose sum is σ = 40981430. Its totient is φ = 10372992.

The previous prime is 22043761. The next prime is 22043789. The reversal of 22043764 is 46734022.

It can be written as a sum of positive squares in 3 ways, for example, as 16483600 + 5560164 = 4060^2 + 2358^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22043761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8379 + ... + 10690.

Almost surely, 2^22043764 is an apocalyptic number.

It is an amenable number.

22043764 is a deficient number, since it is larger than the sum of its proper divisors (18937666).

22043764 is a wasteful number, since it uses less digits than its factorization.

22043764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19107 (or 19088 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 22043764 is about 4695.0787000859. The cubic root of 22043764 is about 280.3896106795.

Adding to 22043764 its reverse (46734022), we get a palindrome (68777786).

The spelling of 22043764 in words is "twenty-two million, forty-three thousand, seven hundred sixty-four".