18420067 has 2 divisors, whose sum is σ = 18420068. Its totient is φ = 18420066.

The previous prime is 18420053. The next prime is 18420071. The reversal of 18420067 is 76002481.

It is a strong prime.

It is an emirp because it is prime and its reverse (76002481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18420067 - 2¹¹ = 18418019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18420007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9210033 + 9210034.

It is an arithmetic number, because the mean of its divisors is an integer number (9210034).

Almost surely, 2^18420067 is an apocalyptic number.

18420067 is a deficient number, since it is larger than the sum of its proper divisors (1).

18420067 is an equidigital number, since it uses as much as digits as its factorization.

18420067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18420067 is about 4291.8605522547. The cubic root of 18420067 is about 264.0971625448.

The spelling of 18420067 in words is "eighteen million, four hundred twenty thousand, sixty-seven".