18842293 has 2 divisors, whose sum is σ = 18842294. Its totient is φ = 18842292.

The previous prime is 18842269. The next prime is 18842297. The reversal of 18842293 is 39224881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18173169 + 669124 = 4263^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 18842293 - 2⁵ = 18842261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18842297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9421146 + 9421147.

It is an arithmetic number, because the mean of its divisors is an integer number (9421147).

Almost surely, 2^18842293 is an apocalyptic number.

It is an amenable number.

18842293 is a deficient number, since it is larger than the sum of its proper divisors (1).

18842293 is an equidigital number, since it uses as much as digits as its factorization.

18842293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 18842293 is about 4340.7710144628. The cubic root of 18842293 is about 266.0998221464.

The spelling of 18842293 in words is "eighteen million, eight hundred forty-two thousand, two hundred ninety-three".