18745211 has 2 divisors, whose sum is σ = 18745212. Its totient is φ = 18745210.

The previous prime is 18745189. The next prime is 18745213. The reversal of 18745211 is 11254781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18745211 is a prime.

Together with 18745213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18745213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372605 + 9372606.

It is an arithmetic number, because the mean of its divisors is an integer number (9372606).

Almost surely, 2^18745211 is an apocalyptic number.

18745211 is a deficient number, since it is larger than the sum of its proper divisors (1).

18745211 is an equidigital number, since it uses as much as digits as its factorization.

18745211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 29.

The square root of 18745211 is about 4329.5739975198. The cubic root of 18745211 is about 265.6420222724.

Adding to 18745211 its reverse (11254781), we get a palindrome (29999992).

The spelling of 18745211 in words is "eighteen million, seven hundred forty-five thousand, two hundred eleven".