12434321903 has 2 divisors, whose sum is σ = 12434321904. Its totient is φ = 12434321902.

The previous prime is 12434321897. The next prime is 12434321947. The reversal of 12434321903 is 30912343421.

It is a weak prime.

It is an emirp because it is prime and its reverse (30912343421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12434321903 - 2¹² = 12434317807 is a prime.

It is a super-2 number, since 2×12434321903² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12434321903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12434321993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6217160951 + 6217160952.

It is an arithmetic number, because the mean of its divisors is an integer number (6217160952).

Almost surely, 2^12434321903 is an apocalyptic number.

12434321903 is a deficient number, since it is larger than the sum of its proper divisors (1).

12434321903 is an equidigital number, since it uses as much as digits as its factorization.

12434321903 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 32.

The spelling of 12434321903 in words is "twelve billion, four hundred thirty-four million, three hundred twenty-one thousand, nine hundred three".