11042423309 has 2 divisors, whose sum is σ = 11042423310. Its totient is φ = 11042423308.

The previous prime is 11042423299. The next prime is 11042423311. The reversal of 11042423309 is 90332424011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9775276900 + 1267146409 = 98870^2 + 35597^2 .

It is a cyclic number.

It is not a de Polignac number, because 11042423309 - 2²⁸ = 10773987853 is a prime.

It is a super-2 number, since 2×11042423309² (a number of 21 digits) contains 22 as substring.

Together with 11042423311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11042423209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521211654 + 5521211655.

It is an arithmetic number, because the mean of its divisors is an integer number (5521211655).

Almost surely, 2^11042423309 is an apocalyptic number.

It is an amenable number.

11042423309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11042423309 is an equidigital number, since it uses as much as digits as its factorization.

11042423309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 11042423309 in words is "eleven billion, forty-two million, four hundred twenty-three thousand, three hundred nine".