19326838441 has 3 divisors (see below), whose sum is σ = 19326977463. Its totient is φ = 19326699420.

The previous prime is 19326838439. The next prime is 19326838481. The reversal of 19326838441 is 14483862391.

It is a happy number.

The square root of 19326838441 is 139021.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14483862391 = 991 ⋅14615401.

It can be written as a sum of positive squares in only one way, i.e., 12775554841 + 6551283600 = 113029^2 + 80940^2 .

It is not a de Polignac number, because 19326838441 - 2¹ = 19326838439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19326838411) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 69511 + ... + 208531.

It is an arithmetic number, because the mean of its divisors is an integer number (6442325821).

Almost surely, 2^19326838441 is an apocalyptic number.

19326838441 is the 139021-st square number.

19326838441 is the 69511-st centered octagonal number.

It is an amenable number.

19326838441 is a deficient number, since it is larger than the sum of its proper divisors (139022).

19326838441 is an frugal number, since it uses more digits than its factorization.

19326838441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278042 (or 139021 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

Multiplying 19326838441 by its sum of digits (49), we get a square (947015083609 = 973147²).

The spelling of 19326838441 in words is "nineteen billion, three hundred twenty-six million, eight hundred thirty-eight thousand, four hundred forty-one".