22191876891 has 24 divisors (see below), whose sum is σ = 33984606240. Its totient is φ = 13906227456.

The previous prime is 22191876869. The next prime is 22191876929. The reversal of 22191876891 is 19867819122.

It is a happy number.

It is not a de Polignac number, because 22191876891 - 2⁶ = 22191876827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22191876841) 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 23 ways as a sum of consecutive naturals, for example, 24450 + ... + 212088.

It is an arithmetic number, because the mean of its divisors is an integer number (1416025260).

Almost surely, 2^22191876891 is an apocalyptic number.

22191876891 is a deficient number, since it is larger than the sum of its proper divisors (11792729349).

22191876891 is a wasteful number, since it uses less digits than its factorization.

22191876891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188435 (or 188432 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The spelling of 22191876891 in words is "twenty-two billion, one hundred ninety-one million, eight hundred seventy-six thousand, eight hundred ninety-one".