18459298225 has 27 divisors (see below), whose sum is σ = 23731367907. Its totient is φ = 14242999680.

The previous prime is 18459298217. The next prime is 18459298243. The reversal of 18459298225 is 52289295481.

The square root of 18459298225 is 135865.

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

It can be written as a sum of positive squares in 13 ways, for example, as 18220410289 + 238887936 = 134983^2 + 15456^2 .

It is not a de Polignac number, because 18459298225 - 2³ = 18459298217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 19699957 + ... + 19700893.

Almost surely, 2^18459298225 is an apocalyptic number.

18459298225 is the 135865-th square number.

18459298225 is the 67933-rd centered octagonal number.

It is an amenable number.

18459298225 is a deficient number, since it is larger than the sum of its proper divisors (5272069682).

18459298225 is an frugal number, since it uses more digits than its factorization.

18459298225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 971 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 55.

The spelling of 18459298225 in words is "eighteen billion, four hundred fifty-nine million, two hundred ninety-eight thousand, two hundred twenty-five".