18338011 has 2 divisors, whose sum is σ = 18338012. Its totient is φ = 18338010.

The previous prime is 18337987. The next prime is 18338083. The reversal of 18338011 is 11083381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18338011 - 2¹⁷ = 18206939 is a prime.

It is a super-2 number, since 2×18338011² = 672565294872242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18338711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9169005 + 9169006.

It is an arithmetic number, because the mean of its divisors is an integer number (9169006).

Almost surely, 2^18338011 is an apocalyptic number.

18338011 is a deficient number, since it is larger than the sum of its proper divisors (1).

18338011 is an equidigital number, since it uses as much as digits as its factorization.

18338011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18338011 is about 4282.2903918347. The cubic root of 18338011 is about 263.7044202961.

The spelling of 18338011 in words is "eighteen million, three hundred thirty-eight thousand, eleven".