11938218469 has 2 divisors, whose sum is σ = 11938218470. Its totient is φ = 11938218468.

The previous prime is 11938218371. The next prime is 11938218521. The reversal of 11938218469 is 96481283911.

11938218469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (11938218521) can be obtained adding 11938218469 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11521446244 + 416772225 = 107338^2 + 20415^2 .

It is a cyclic number.

It is not a de Polignac number, because 11938218469 - 2²¹ = 11936121317 is a prime.

It is a super-2 number, since 2×11938218469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11938218869) 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 as a sum of consecutive naturals, namely, 5969109234 + 5969109235.

It is an arithmetic number, because the mean of its divisors is an integer number (5969109235).

Almost surely, 2^11938218469 is an apocalyptic number.

It is an amenable number.

11938218469 is a deficient number, since it is larger than the sum of its proper divisors (1).

11938218469 is an equidigital number, since it uses as much as digits as its factorization.

11938218469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 52.

The spelling of 11938218469 in words is "eleven billion, nine hundred thirty-eight million, two hundred eighteen thousand, four hundred sixty-nine".