18097849 has 24 divisors (see below), whose sum is σ = 23748480. Its totient is φ = 13474560.

The previous prime is 18097817. The next prime is 18097889. The reversal of 18097849 is 94879081.

It is a happy number.

It is not a de Polignac number, because 18097849 - 2⁵ = 18097817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18097799 and 18097808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18097889) 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 23 ways as a sum of consecutive naturals, for example, 19017 + ... + 19945.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^18097849 is an apocalyptic number.

It is an amenable number.

18097849 is a deficient number, since it is larger than the sum of its proper divisors (5650631).

18097849 is a wasteful number, since it uses less digits than its factorization.

18097849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 18097849 is about 4254.1566731845. The cubic root of 18097849 is about 262.5481647070.

The spelling of 18097849 in words is "eighteen million, ninety-seven thousand, eight hundred forty-nine".