19212404399 has 2 divisors, whose sum is σ = 19212404400. Its totient is φ = 19212404398.

The previous prime is 19212404377. The next prime is 19212404423. The reversal of 19212404399 is 99340421291.

It is a weak prime.

It is an emirp because it is prime and its reverse (99340421291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19212404399 - 2¹² = 19212400303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19212409399) 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, 9606202199 + 9606202200.

It is an arithmetic number, because the mean of its divisors is an integer number (9606202200).

Almost surely, 2^19212404399 is an apocalyptic number.

19212404399 is a deficient number, since it is larger than the sum of its proper divisors (1).

19212404399 is an equidigital number, since it uses as much as digits as its factorization.

19212404399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 19212404399 in words is "nineteen billion, two hundred twelve million, four hundred four thousand, three hundred ninety-nine".