22536420 has 24 divisors (see below), whose sum is σ = 63102144. Its totient is φ = 6009696.

The previous prime is 22536419. The next prime is 22536421. The reversal of 22536420 is 2463522.

It is an interprime number because it is at equal distance from previous prime (22536419) and next prime (22536421).

It is not an unprimeable number, because it can be changed into a prime (22536421) 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 7 ways as a sum of consecutive naturals, for example, 187744 + ... + 187863.

It is an arithmetic number, because the mean of its divisors is an integer number (2629256).

Almost surely, 2^22536420 is an apocalyptic number.

22536420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22536420 is an abundant number, since it is smaller than the sum of its proper divisors (40565724).

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

22536420 is a wasteful number, since it uses less digits than its factorization.

22536420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375619 (or 375617 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22536420 is about 4747.2539430707. The cubic root of 22536420 is about 282.4630489170.

Adding to 22536420 its reverse (2463522), we get a palindrome (24999942).

The spelling of 22536420 in words is "twenty-two million, five hundred thirty-six thousand, four hundred twenty".