11820431393 has 2 divisors, whose sum is σ = 11820431394. Its totient is φ = 11820431392.

The previous prime is 11820431303. The next prime is 11820431429. The reversal of 11820431393 is 39313402811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8238648289 + 3581783104 = 90767^2 + 59848^2 .

It is a cyclic number.

It is not a de Polignac number, because 11820431393 - 2³² = 7525464097 is a prime.

It is not a weakly prime, because it can be changed into another prime (11820431303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910215696 + 5910215697.

It is an arithmetic number, because the mean of its divisors is an integer number (5910215697).

Almost surely, 2^11820431393 is an apocalyptic number.

It is an amenable number.

11820431393 is a deficient number, since it is larger than the sum of its proper divisors (1).

11820431393 is an equidigital number, since it uses as much as digits as its factorization.

11820431393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 11820431393 in words is "eleven billion, eight hundred twenty million, four hundred thirty-one thousand, three hundred ninety-three".