22009554 has 24 divisors (see below), whose sum is σ = 54500160. Its totient is φ = 6288408.

The previous prime is 22009553. The next prime is 22009601. The reversal of 22009554 is 45590022.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22009553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87214 + ... + 87465.

It is an arithmetic number, because the mean of its divisors is an integer number (2270840).

Almost surely, 2^22009554 is an apocalyptic number.

22009554 is an abundant number, since it is smaller than the sum of its proper divisors (32490606).

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

22009554 is a wasteful number, since it uses less digits than its factorization.

22009554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174694 (or 174691 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22009554 is about 4691.4341090971. The cubic root of 22009554 is about 280.2444888374.

Adding to 22009554 its reverse (45590022), we get a palindrome (67599576).

The spelling of 22009554 in words is "twenty-two million, nine thousand, five hundred fifty-four".