22128589487 has 4 divisors (see below), whose sum is σ = 22290112176. Its totient is φ = 21967066800.

The previous prime is 22128589481. The next prime is 22128589559. The reversal of 22128589487 is 78498582122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22128589487 - 2⁶ = 22128589423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22128589481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80761139 + ... + 80761412.

It is an arithmetic number, because the mean of its divisors is an integer number (5572528044).

Almost surely, 2^22128589487 is an apocalyptic number.

22128589487 is a deficient number, since it is larger than the sum of its proper divisors (161522689).

22128589487 is a wasteful number, since it uses less digits than its factorization.

22128589487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161522688.

The product of its digits is 5160960, while the sum is 56.

The spelling of 22128589487 in words is "twenty-two billion, one hundred twenty-eight million, five hundred eighty-nine thousand, four hundred eighty-seven".