18343197 has 6 divisors (see below), whose sum is σ = 26495742. Its totient is φ = 12228792.

The previous prime is 18343183. The next prime is 18343219. The reversal of 18343197 is 79134381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16208676 + 2134521 = 4026^2 + 1461^2 .

It is not a de Polignac number, because 18343197 - 2⁴ = 18343181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1019058 + ... + 1019075.

It is an arithmetic number, because the mean of its divisors is an integer number (4415957).

Almost surely, 2^18343197 is an apocalyptic number.

It is an amenable number.

18343197 is a deficient number, since it is larger than the sum of its proper divisors (8152545).

18343197 is a wasteful number, since it uses less digits than its factorization.

18343197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038139 (or 2038136 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 18343197 is about 4282.8958661168. The cubic root of 18343197 is about 263.7292765401.

The spelling of 18343197 in words is "eighteen million, three hundred forty-three thousand, one hundred ninety-seven".