18480499249 has 9 divisors (see below), whose sum is σ = 18769695147. Its totient is φ = 18195698664.

The previous prime is 18480499159. The next prime is 18480499291. The reversal of 18480499249 is 94299408481.

The square root of 18480499249 is 135943.

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., 18335055649 + 145443600 = 135407^2 + 12060^2 .

It is not a de Polignac number, because 18480499249 - 2²⁹ = 17943628337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18480499193 and 18480499202.

It is not an unprimeable number, because it can be changed into a prime (18480499649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9107167 + ... + 9109195.

It is an arithmetic number, because the mean of its divisors is an integer number (2085521683).

Almost surely, 2^18480499249 is an apocalyptic number.

18480499249 is the 135943-rd square number.

18480499249 is the 67972-nd centered octagonal number.

It is an amenable number.

18480499249 is a deficient number, since it is larger than the sum of its proper divisors (289195898).

18480499249 is an frugal number, since it uses more digits than its factorization.

18480499249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 18480499249 in words is "eighteen billion, four hundred eighty million, four hundred ninety-nine thousand, two hundred forty-nine".