18288025 has 18 divisors (see below), whose sum is σ = 26381310. Its totient is φ = 12539520.

The previous prime is 18288019. The next prime is 18288031. The reversal of 18288025 is 52088281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18288019) and next prime (18288031).

It can be written as a sum of positive squares in 3 ways, for example, as 3519376 + 14768649 = 1876^2 + 3843^2 .

It is not a de Polignac number, because 18288025 - 2⁷ = 18287897 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6240 + ... + 8689.

Almost surely, 2^18288025 is an apocalyptic number.

It is an amenable number.

18288025 is a deficient number, since it is larger than the sum of its proper divisors (8093285).

18288025 is a wasteful number, since it uses less digits than its factorization.

18288025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14953 (or 14941 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 18288025 is about 4276.4500464755. The cubic root of 18288025 is about 263.4645992286.

The spelling of 18288025 in words is "eighteen million, two hundred eighty-eight thousand, twenty-five".