22538442891 has 8 divisors (see below), whose sum is σ = 30053676240. Its totient is φ = 15024419072.

The previous prime is 22538442887. The next prime is 22538442907. The reversal of 22538442891 is 19824483522.

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

It is a cyclic number.

It is not a de Polignac number, because 22538442891 - 2² = 22538442887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22538442891.

It is not an unprimeable number, because it can be changed into a prime (22538442881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 257970 + ... + 334103.

It is an arithmetic number, because the mean of its divisors is an integer number (3756709530).

Almost surely, 2^22538442891 is an apocalyptic number.

22538442891 is a deficient number, since it is larger than the sum of its proper divisors (7515233349).

22538442891 is a wasteful number, since it uses less digits than its factorization.

22538442891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604765.

The product of its digits is 1105920, while the sum is 48.

The spelling of 22538442891 in words is "twenty-two billion, five hundred thirty-eight million, four hundred forty-two thousand, eight hundred ninety-one".