19340345389 has 2 divisors, whose sum is σ = 19340345390. Its totient is φ = 19340345388.

The previous prime is 19340345383. The next prime is 19340345399. The reversal of 19340345389 is 98354304391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19334902500 + 5442889 = 139050^2 + 2333^2 .

It is a cyclic number.

It is not a de Polignac number, because 19340345389 - 2¹³ = 19340337197 is a prime.

It is a super-2 number, since 2×19340345389² (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 (19340345383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9670172694 + 9670172695.

It is an arithmetic number, because the mean of its divisors is an integer number (9670172695).

Almost surely, 2^19340345389 is an apocalyptic number.

It is an amenable number.

19340345389 is a deficient number, since it is larger than the sum of its proper divisors (1).

19340345389 is an equidigital number, since it uses as much as digits as its factorization.

19340345389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 19340345389 in words is "nineteen billion, three hundred forty million, three hundred forty-five thousand, three hundred eighty-nine".