19403999999 has 2 divisors, whose sum is σ = 19404000000. Its totient is φ = 19403999998.

The previous prime is 19403999941. The next prime is 19404000017. The reversal of 19403999999 is 99999930491.

It is a strong prime.

It is an emirp because it is prime and its reverse (99999930491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19403999999 - 2⁸ = 19403999743 is a prime.

It is a super-2 number, since 2×19403999999² (a number of 21 digits) contains 22 as substring.

19403999999 is a modest number, since divided by 999999 gives 19403 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19403992999) 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, 9701999999 + 9702000000.

It is an arithmetic number, because the mean of its divisors is an integer number (9702000000).

Almost surely, 2^19403999999 is an apocalyptic number.

19403999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

19403999999 is an equidigital number, since it uses as much as digits as its factorization.

19403999999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57395628, while the sum is 71.

The spelling of 19403999999 in words is "nineteen billion, four hundred three million, nine hundred ninety-nine thousand, nine hundred ninety-nine".