22016644 has 18 divisors (see below), whose sum is σ = 41722170. Its totient is φ = 10161216.

The previous prime is 22016639. The next prime is 22016647. The reversal of 22016644 is 44661022.

It can be written as a sum of positive squares in 3 ways, for example, as 2214144 + 19802500 = 1488^2 + 4450^2 .

It is a super-2 number, since 2×22016644² = 969465226045472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22016647) 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 5 ways as a sum of consecutive naturals, for example, 15609 + ... + 16960.

Almost surely, 2^22016644 is an apocalyptic number.

It is an amenable number.

22016644 is a deficient number, since it is larger than the sum of its proper divisors (19705526).

22016644 is a wasteful number, since it uses less digits than its factorization.

22016644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32599 (or 32584 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 22016644 is about 4692.1896807354. The cubic root of 22016644 is about 280.2745775906.

Adding to 22016644 its reverse (44661022), we get a palindrome (66677666).

The spelling of 22016644 in words is "twenty-two million, sixteen thousand, six hundred forty-four".