18324737 has 2 divisors, whose sum is σ = 18324738. Its totient is φ = 18324736.

The previous prime is 18324707. The next prime is 18324739. The reversal of 18324737 is 73742381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12559936 + 5764801 = 3544^2 + 2401^2 .

It is a cyclic number.

It is not a de Polignac number, because 18324737 - 2¹⁰ = 18323713 is a prime.

It is a super-2 number, since 2×18324737² = 671591972238338, which contains 22 as substring.

Together with 18324739, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18324697 and 18324706.

It is not a weakly prime, because it can be changed into another prime (18324739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9162368 + 9162369.

It is an arithmetic number, because the mean of its divisors is an integer number (9162369).

Almost surely, 2^18324737 is an apocalyptic number.

It is an amenable number.

18324737 is a deficient number, since it is larger than the sum of its proper divisors (1).

18324737 is an equidigital number, since it uses as much as digits as its factorization.

18324737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 18324737 is about 4280.7402397249. The cubic root of 18324737 is about 263.6407773087.

The spelling of 18324737 in words is "eighteen million, three hundred twenty-four thousand, seven hundred thirty-seven".