22640342243 has 4 divisors (see below), whose sum is σ = 22840699368. Its totient is φ = 22439985120.

The previous prime is 22640342233. The next prime is 22640342287. The reversal of 22640342243 is 34224304622.

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

It is a cyclic number.

It is not a de Polignac number, because 22640342243 - 2⁴ = 22640342227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22640342233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100178393 + ... + 100178618.

It is an arithmetic number, because the mean of its divisors is an integer number (5710174842).

Almost surely, 2^22640342243 is an apocalyptic number.

22640342243 is a deficient number, since it is larger than the sum of its proper divisors (200357125).

22640342243 is a wasteful number, since it uses less digits than its factorization.

22640342243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200357124.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 22640342243 its reverse (34224304622), we get a palindrome (56864646865).

The spelling of 22640342243 in words is "twenty-two billion, six hundred forty million, three hundred forty-two thousand, two hundred forty-three".