18814331 has 2 divisors, whose sum is σ = 18814332. Its totient is φ = 18814330.

The previous prime is 18814307. The next prime is 18814339. The reversal of 18814331 is 13341881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18814331 - 2¹⁰ = 18813307 is a prime.

It is a super-2 number, since 2×18814331² = 707958101955122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 18814294 and 18814303.

It is not a weakly prime, because it can be changed into another prime (18814339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407165 + 9407166.

It is an arithmetic number, because the mean of its divisors is an integer number (9407166).

Almost surely, 2^18814331 is an apocalyptic number.

18814331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814331 is an equidigital number, since it uses as much as digits as its factorization.

18814331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 18814331 is about 4337.5489622597. The cubic root of 18814331 is about 265.9681260921.

The spelling of 18814331 in words is "eighteen million, eight hundred fourteen thousand, three hundred thirty-one".