18097725 has 12 divisors (see below), whose sum is σ = 29921696. Its totient is φ = 9652080.

The previous prime is 18097721. The next prime is 18097753. The reversal of 18097725 is 52779081.

It is not a de Polignac number, because 18097725 - 2² = 18097721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18097721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120577 + ... + 120726.

Almost surely, 2^18097725 is an apocalyptic number.

18097725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18097725 is a deficient number, since it is larger than the sum of its proper divisors (11823971).

18097725 is a wasteful number, since it uses less digits than its factorization.

18097725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241316 (or 241311 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 18097725 is about 4254.1420991782. The cubic root of 18097725 is about 262.5475650768.

The spelling of 18097725 in words is "eighteen million, ninety-seven thousand, seven hundred twenty-five".