19380259369 has 27 divisors (see below), whose sum is σ = 21778436631. Its totient is φ = 17240137920.

The previous prime is 19380259343. The next prime is 19380259399. The reversal of 19380259369 is 96395208391.

It is a happy number.

The square root of 19380259369 is 139213.

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

It can be written as a sum of positive squares in only one way, i.e., 15088437225 + 4291822144 = 122835^2 + 65512^2 .

It is not a de Polignac number, because 19380259369 - 2¹⁵ = 19380226601 is a prime.

It is a super-2 number, since 2×19380259369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19380259399) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 44965584 + ... + 44966014.

Almost surely, 2^19380259369 is an apocalyptic number.

19380259369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19380259369 is the 139213-rd square number.

19380259369 is the 69607-th centered octagonal number.

It is an amenable number.

19380259369 is a deficient number, since it is larger than the sum of its proper divisors (2398177262).

19380259369 is an frugal number, since it uses more digits than its factorization.

19380259369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 19380259369 in words is "nineteen billion, three hundred eighty million, two hundred fifty-nine thousand, three hundred sixty-nine".