18097965 has 16 divisors (see below), whose sum is σ = 32174400. Its totient is φ = 9652176.

The previous prime is 18097931. The next prime is 18097991. The reversal of 18097965 is 56979081.

It is not a de Polignac number, because 18097965 - 2¹⁰ = 18096941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18097965.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66895 + ... + 67164.

It is an arithmetic number, because the mean of its divisors is an integer number (2010900).

Almost surely, 2^18097965 is an apocalyptic number.

18097965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18097965 is a deficient number, since it is larger than the sum of its proper divisors (14076435).

18097965 is a wasteful number, since it uses less digits than its factorization.

18097965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134073 (or 134067 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 18097965 is about 4254.1703068871. The cubic root of 18097965 is about 262.5487256488.

The spelling of 18097965 in words is "eighteen million, ninety-seven thousand, nine hundred sixty-five".