18325019 has 2 divisors, whose sum is σ = 18325020. Its totient is φ = 18325018.

The previous prime is 18325007. The next prime is 18325033. The reversal of 18325019 is 91052381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18325019 - 2⁴ = 18325003 is a prime.

It is a super-2 number, since 2×18325019² = 671612642700722, 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 = 18324982 and 18325000.

It is not a weakly prime, because it can be changed into another prime (18325079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9162509 + 9162510.

It is an arithmetic number, because the mean of its divisors is an integer number (9162510).

Almost surely, 2^18325019 is an apocalyptic number.

18325019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18325019 is an equidigital number, since it uses as much as digits as its factorization.

18325019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 18325019 is about 4280.7731778266. The cubic root of 18325019 is about 263.6421296941.

The spelling of 18325019 in words is "eighteen million, three hundred twenty-five thousand, nineteen".