18297825 has 72 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 7701120.

The previous prime is 18297809. The next prime is 18297827. The reversal of 18297825 is 52879281.

It is not a de Polignac number, because 18297825 - 2⁴ = 18297809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18297827) 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 71 ways as a sum of consecutive naturals, for example, 47584 + ... + 47966.

It is an arithmetic number, because the mean of its divisors is an integer number (527744).

Almost surely, 2^18297825 is an apocalyptic number.

18297825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18297825 is an abundant number, since it is smaller than the sum of its proper divisors (19699743).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18297825 is a wasteful number, since it uses less digits than its factorization.

18297825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 411 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 18297825 is about 4277.5957031959. The cubic root of 18297825 is about 263.5116517309.

The spelling of 18297825 in words is "eighteen million, two hundred ninety-seven thousand, eight hundred twenty-five".