19303212109 has 2 divisors, whose sum is σ = 19303212110. Its totient is φ = 19303212108.

The previous prime is 19303212079. The next prime is 19303212113. The reversal of 19303212109 is 90121230391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18243904900 + 1059307209 = 135070^2 + 32547^2 .

It is an emirp because it is prime and its reverse (90121230391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19303212109 - 2⁷ = 19303211981 is a prime.

It is a super-2 number, since 2×19303212109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19303212119) 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, 9651606054 + 9651606055.

It is an arithmetic number, because the mean of its divisors is an integer number (9651606055).

Almost surely, 2^19303212109 is an apocalyptic number.

It is an amenable number.

19303212109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19303212109 is an equidigital number, since it uses as much as digits as its factorization.

19303212109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 19303212109 in words is "nineteen billion, three hundred three million, two hundred twelve thousand, one hundred nine".