18324913 has 2 divisors, whose sum is σ = 18324914. Its totient is φ = 18324912.

The previous prime is 18324893. The next prime is 18324931. The reversal of 18324913 is 31942381.

Together with next prime (18324931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13965169 + 4359744 = 3737^2 + 2088^2 .

It is a cyclic number.

It is not a de Polignac number, because 18324913 - 2⁵ = 18324881 is a prime.

It is not a weakly prime, because it can be changed into another prime (18324973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9162456 + 9162457.

It is an arithmetic number, because the mean of its divisors is an integer number (9162457).

Almost surely, 2^18324913 is an apocalyptic number.

It is an amenable number.

18324913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18324913 is an equidigital number, since it uses as much as digits as its factorization.

18324913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 18324913 is about 4280.7607968678. The cubic root of 18324913 is about 263.6416213523.

The spelling of 18324913 in words is "eighteen million, three hundred twenty-four thousand, nine hundred thirteen".