19273491241 has 3 divisors (see below), whose sum is σ = 19273630071. Its totient is φ = 19273352412.

The previous prime is 19273491239. The next prime is 19273491247. The reversal of 19273491241 is 14219437291.

It is a happy number.

The square root of 19273491241 is 138829.

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: 14219437291 = 31573 ⋅450367.

It can be written as a sum of positive squares in only one way, i.e., 6236418841 + 13037072400 = 78971^2 + 114180^2 .

It is not a de Polignac number, because 19273491241 - 2¹ = 19273491239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19273491247) 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, 69415 + ... + 208243.

It is an arithmetic number, because the mean of its divisors is an integer number (6424543357).

Almost surely, 2^19273491241 is an apocalyptic number.

19273491241 is the 138829-th square number.

19273491241 is the 69415-th centered octagonal number.

It is an amenable number.

19273491241 is a deficient number, since it is larger than the sum of its proper divisors (138830).

19273491241 is an frugal number, since it uses more digits than its factorization.

19273491241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277658 (or 138829 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The spelling of 19273491241 in words is "nineteen billion, two hundred seventy-three million, four hundred ninety-one thousand, two hundred forty-one".