18093331 has 2 divisors, whose sum is σ = 18093332. Its totient is φ = 18093330.

The previous prime is 18093307. The next prime is 18093337. The reversal of 18093331 is 13339081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18093331 is a prime.

It is a super-2 number, since 2×18093331² = 654737253351122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18093331.

It is not a weakly prime, because it can be changed into another prime (18093337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9046665 + 9046666.

It is an arithmetic number, because the mean of its divisors is an integer number (9046666).

Almost surely, 2^18093331 is an apocalyptic number.

18093331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18093331 is an equidigital number, since it uses as much as digits as its factorization.

18093331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 18093331 is about 4253.6256299773. The cubic root of 18093331 is about 262.5263151245.

The spelling of 18093331 in words is "eighteen million, ninety-three thousand, three hundred thirty-one".