18942211 has 2 divisors, whose sum is σ = 18942212. Its totient is φ = 18942210.

The previous prime is 18942169. The next prime is 18942223. The reversal of 18942211 is 11224981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18942211 - 2⁷ = 18942083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18942211.

It is not a weakly prime, because it can be changed into another prime (18942241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9471105 + 9471106.

It is an arithmetic number, because the mean of its divisors is an integer number (9471106).

Almost surely, 2^18942211 is an apocalyptic number.

18942211 is a deficient number, since it is larger than the sum of its proper divisors (1).

18942211 is an equidigital number, since it uses as much as digits as its factorization.

18942211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 18942211 is about 4352.2650424808. The cubic root of 18942211 is about 266.5693563347.

The spelling of 18942211 in words is "eighteen million, nine hundred forty-two thousand, two hundred eleven".