18097907 has 4 divisors (see below), whose sum is σ = 18394656. Its totient is φ = 17801160.

The previous prime is 18097903. The next prime is 18097909. The reversal of 18097907 is 70979081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70979081 = 23 ⋅3086047.

It is a cyclic number.

It is not a de Polignac number, because 18097907 - 2² = 18097903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18097903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148283 + ... + 148404.

It is an arithmetic number, because the mean of its divisors is an integer number (4598664).

Almost surely, 2^18097907 is an apocalyptic number.

18097907 is a deficient number, since it is larger than the sum of its proper divisors (296749).

18097907 is an equidigital number, since it uses as much as digits as its factorization.

18097907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296748.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 18097907 is about 4254.1634900413. The cubic root of 18097907 is about 262.5484451782.

It can be divided in two parts, 1 and 8097907, that added together give a palindrome (8097908).

The spelling of 18097907 in words is "eighteen million, ninety-seven thousand, nine hundred seven".