22001423243 has 4 divisors (see below), whose sum is σ = 22760093040. Its totient is φ = 21242753448.

The previous prime is 22001423221. The next prime is 22001423263. The reversal of 22001423243 is 34232410022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22001423243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001423263) 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, 379334855 + ... + 379334912.

It is an arithmetic number, because the mean of its divisors is an integer number (5690023260).

Almost surely, 2^22001423243 is an apocalyptic number.

22001423243 is a deficient number, since it is larger than the sum of its proper divisors (758669797).

22001423243 is an equidigital number, since it uses as much as digits as its factorization.

22001423243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758669796.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 22001423243 its reverse (34232410022), we get a palindrome (56233833265).

The spelling of 22001423243 in words is "twenty-two billion, one million, four hundred twenty-three thousand, two hundred forty-three".