22528643893 has 8 divisors (see below), whose sum is σ = 26345789888. Its totient is φ = 18861189984.

The previous prime is 22528643869. The next prime is 22528643927. The reversal of 22528643893 is 39834682522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22528643893 - 2⁵ = 22528643861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22528643893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22528643833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37422696 + ... + 37423297.

It is an arithmetic number, because the mean of its divisors is an integer number (3293223736).

Almost surely, 2^22528643893 is an apocalyptic number.

It is an amenable number.

22528643893 is a deficient number, since it is larger than the sum of its proper divisors (3817145995).

22528643893 is an equidigital number, since it uses as much as digits as its factorization.

22528643893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74846043.

The product of its digits is 4976640, while the sum is 52.

The spelling of 22528643893 in words is "twenty-two billion, five hundred twenty-eight million, six hundred forty-three thousand, eight hundred ninety-three".