18068242 has 4 divisors (see below), whose sum is σ = 27102366. Its totient is φ = 9034120.

The previous prime is 18068233. The next prime is 18068251. The reversal of 18068242 is 24286081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24286081 = 17 ⋅1428593.

It is an interprime number because it is at equal distance from previous prime (18068233) and next prime (18068251).

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 8649481 = 3069^2 + 2941^2 .

It is a super-2 number, since 2×18068242² = 652922737941128, which contains 22 as substring.

It is an unprimeable number.

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, 4517059 + ... + 4517062.

Almost surely, 2^18068242 is an apocalyptic number.

18068242 is a deficient number, since it is larger than the sum of its proper divisors (9034124).

18068242 is an equidigital number, since it uses as much as digits as its factorization.

18068242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9034123.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18068242 is about 4250.6754757332. The cubic root of 18068242 is about 262.4049155242.

The spelling of 18068242 in words is "eighteen million, sixty-eight thousand, two hundred forty-two".