11820431399 has 8 divisors (see below), whose sum is σ = 13514686848. Its totient is φ = 10127581560.

The previous prime is 11820431393. The next prime is 11820431429. The reversal of 11820431399 is 99313402811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11820431399 - 2¹² = 11820427303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11820431393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333317 + ... + 367070.

It is an arithmetic number, because the mean of its divisors is an integer number (1689335856).

Almost surely, 2^11820431399 is an apocalyptic number.

11820431399 is a deficient number, since it is larger than the sum of its proper divisors (1694255449).

11820431399 is an equidigital number, since it uses as much as digits as its factorization.

11820431399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702805.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 11820431399 in words is "eleven billion, eight hundred twenty million, four hundred thirty-one thousand, three hundred ninety-nine".