18630025 has 6 divisors (see below), whose sum is σ = 23101262. Its totient is φ = 14904000.

The previous prime is 18629999. The next prime is 18630037. The reversal of 18630025 is 52003681.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2972176 + 15657849 = 1724^2 + 3957^2 .

It is not a de Polignac number, because 18630025 - 2⁵ = 18629993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 745201 = 18630025 / (1 + 8 + 6 + 3 + 0 + 0 + 2 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 372576 + ... + 372625.

Almost surely, 2^18630025 is an apocalyptic number.

It is an amenable number.

18630025 is a deficient number, since it is larger than the sum of its proper divisors (4471237).

18630025 is an equidigital number, since it uses as much as digits as its factorization.

18630025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745211 (or 745206 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 18630025 is about 4316.2512670140. The cubic root of 18630025 is about 265.0967962517.

The spelling of 18630025 in words is "eighteen million, six hundred thirty thousand, twenty-five".