18197307 has 12 divisors (see below), whose sum is σ = 27668680. Its totient is φ = 11492928.

The previous prime is 18197287. The next prime is 18197321. The reversal of 18197307 is 70379181.

It is not a de Polignac number, because 18197307 - 2⁶ = 18197243 is a prime.

It is a super-2 number, since 2×18197307² = 662283964104498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18190307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53038 + ... + 53379.

Almost surely, 2^18197307 is an apocalyptic number.

18197307 is a deficient number, since it is larger than the sum of its proper divisors (9471373).

18197307 is a wasteful number, since it uses less digits than its factorization.

18197307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106442 (or 106439 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 18197307 is about 4265.8301653957. The cubic root of 18197307 is about 263.0282369794.

The spelling of 18197307 in words is "eighteen million, one hundred ninety-seven thousand, three hundred seven".