22042340443 has 4 divisors (see below), whose sum is σ = 22103740080. Its totient is φ = 21980940808.

The previous prime is 22042340407. The next prime is 22042340459. The reversal of 22042340443 is 34404324022.

It is a happy number.

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 22042340443 - 2⁹ = 22042339931 is a prime.

It is a super-2 number, since 2×22042340443² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22042340143) 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, 30699280 + ... + 30699997.

It is an arithmetic number, because the mean of its divisors is an integer number (5525935020).

Almost surely, 2^22042340443 is an apocalyptic number.

22042340443 is a deficient number, since it is larger than the sum of its proper divisors (61399637).

22042340443 is an equidigital number, since it uses as much as digits as its factorization.

22042340443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61399636.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 22042340443 its reverse (34404324022), we get a palindrome (56446664465).

The spelling of 22042340443 in words is "twenty-two billion, forty-two million, three hundred forty thousand, four hundred forty-three".