18082449841 has 3 divisors (see below), whose sum is σ = 18082584313. Its totient is φ = 18082315370.

The previous prime is 18082449829. The next prime is 18082449887. The reversal of 18082449841 is 14894428081.

The square root of 18082449841 is 134471.

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: 14894428081 = 13 ⋅1145725237.

It is not a de Polignac number, because 18082449841 - 2⁷ = 18082449713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18082449811) 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, 67236 + ... + 201706.

Almost surely, 2^18082449841 is an apocalyptic number.

18082449841 is the 134471-st square number.

18082449841 is the 67236-th centered octagonal number.

It is an amenable number.

18082449841 is a deficient number, since it is larger than the sum of its proper divisors (134472).

18082449841 is an frugal number, since it uses more digits than its factorization.

18082449841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268942 (or 134471 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 49.

Multiplying 18082449841 by its sum of digits (49), we get a square (886040042209 = 941297²).

The spelling of 18082449841 in words is "eighteen billion, eighty-two million, four hundred forty-nine thousand, eight hundred forty-one".