22123445645 has 32 divisors (see below), whose sum is σ = 30877459200. Its totient is φ = 14902373376.

The previous prime is 22123445639. The next prime is 22123445653. The reversal of 22123445645 is 54654432122.

It is a cyclic number.

It is not a de Polignac number, because 22123445645 - 2¹⁴ = 22123429261 is a prime.

It is a super-3 number, since 3×22123445645³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22123445599 and 22123445608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3666491 + ... + 3672519.

It is an arithmetic number, because the mean of its divisors is an integer number (964920600).

Almost surely, 2^22123445645 is an apocalyptic number.

It is an amenable number.

22123445645 is a deficient number, since it is larger than the sum of its proper divisors (8754013555).

22123445645 is a wasteful number, since it uses less digits than its factorization.

22123445645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7877.

The product of its digits is 230400, while the sum is 38.

Adding to 22123445645 its reverse (54654432122), we get a palindrome (76777877767).

The spelling of 22123445645 in words is "twenty-two billion, one hundred twenty-three million, four hundred forty-five thousand, six hundred forty-five".