22516004 has 24 divisors (see below), whose sum is σ = 46081728. Its totient is φ = 9424800.

The previous prime is 22516001. The next prime is 22516019. The reversal of 22516004 is 40061522.

It is a happy number.

It is a super-2 number, since 2×22516004² = 1013940872256032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22516001) 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 7 ways as a sum of consecutive naturals, for example, 8147 + ... + 10554.

It is an arithmetic number, because the mean of its divisors is an integer number (1920072).

Almost surely, 2^22516004 is an apocalyptic number.

It is an amenable number.

22516004 is an abundant number, since it is smaller than the sum of its proper divisors (23565724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22516004 is a wasteful number, since it uses less digits than its factorization.

22516004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18755 (or 18753 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22516004 is about 4745.1031601009. The cubic root of 22516004 is about 282.3777276477.

Adding to 22516004 its reverse (40061522), we get a palindrome (62577526).

The spelling of 22516004 in words is "twenty-two million, five hundred sixteen thousand, four".