18008298025 has 9 divisors (see below), whose sum is σ = 22331121591. Its totient is φ = 14406101640.

The previous prime is 18008298023. The next prime is 18008298041. The reversal of 18008298025 is 52089280081.

The square root of 18008298025 is 134195.

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., 6482987289 + 11525310736 = 80517^2 + 107356^2 .

It is not a de Polignac number, because 18008298025 - 2¹ = 18008298023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18008298023) 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, 657556 + ... + 684394.

Almost surely, 2^18008298025 is an apocalyptic number.

18008298025 is the 134195-th square number.

18008298025 is the 67098-th centered octagonal number.

It is an amenable number.

18008298025 is a deficient number, since it is larger than the sum of its proper divisors (4322823566).

18008298025 is an frugal number, since it uses more digits than its factorization.

18008298025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53688 (or 26844 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 18008298025 in words is "eighteen billion, eight million, two hundred ninety-eight thousand, twenty-five".