18682331 has 2 divisors, whose sum is σ = 18682332. Its totient is φ = 18682330.

The previous prime is 18682309. The next prime is 18682333. The reversal of 18682331 is 13328681.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18682331 - 2⁶ = 18682267 is a prime.

It is a super-2 number, since 2×18682331² = 698058983187122, which contains 22 as substring.

Together with 18682333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18682333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9341165 + 9341166.

It is an arithmetic number, because the mean of its divisors is an integer number (9341166).

Almost surely, 2^18682331 is an apocalyptic number.

18682331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18682331 is an equidigital number, since it uses as much as digits as its factorization.

18682331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 18682331 is about 4322.3062131228. The cubic root of 18682331 is about 265.3446613024.

The spelling of 18682331 in words is "eighteen million, six hundred eighty-two thousand, three hundred thirty-one".