22108019309 has 4 divisors (see below), whose sum is σ = 22110803616. Its totient is φ = 22105235004.

The previous prime is 22108019243. The next prime is 22108019407. The reversal of 22108019309 is 90391080122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22108019309 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 (22108019209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380209 + ... + 1396134.

It is an arithmetic number, because the mean of its divisors is an integer number (5527700904).

Almost surely, 2^22108019309 is an apocalyptic number.

It is an amenable number.

22108019309 is a deficient number, since it is larger than the sum of its proper divisors (2784307).

22108019309 is an equidigital number, since it uses as much as digits as its factorization.

22108019309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784306.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 22108019309 in words is "twenty-two billion, one hundred eight million, nineteen thousand, three hundred nine".