19309107889369 has 9 divisors (see below), whose sum is σ = 19768793359989. Its totient is φ = 18859874311740.

The previous prime is 19309107889321. The next prime is 19309107889429. The reversal of 19309107889369 is 96398870190391.

The square root of 19309107889369 is 4394213.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 19309107889369 - 2³¹ = 19306960405721 is a prime.

It is a super-2 number, since 2×19309107889369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19309107889069) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 188900064 + ... + 189002254.

Almost surely, 2^{19309107889369} is an apocalyptic number.

19309107889369 is the 4394213-rd square number.

19309107889369 is the 2197107-th centered octagonal number.

It is an amenable number.

19309107889369 is a deficient number, since it is larger than the sum of its proper divisors (459685470620).

19309107889369 is an frugal number, since it uses more digits than its factorization.

19309107889369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204468 (or 102234 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 73.

The spelling of 19309107889369 in words is "nineteen trillion, three hundred nine billion, one hundred seven million, eight hundred eighty-nine thousand, three hundred sixty-nine".