18949211 has 2 divisors, whose sum is σ = 18949212. Its totient is φ = 18949210.

The previous prime is 18949181. The next prime is 18949243. The reversal of 18949211 is 11294981.

It is a weak prime.

It is an emirp because it is prime and its reverse (11294981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18949211 - 2¹⁴ = 18932827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18942211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474605 + 9474606.

It is an arithmetic number, because the mean of its divisors is an integer number (9474606).

Almost surely, 2^18949211 is an apocalyptic number.

18949211 is a deficient number, since it is larger than the sum of its proper divisors (1).

18949211 is an equidigital number, since it uses as much as digits as its factorization.

18949211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 18949211 is about 4353.0691471650. The cubic root of 18949211 is about 266.6021887513.

The spelling of 18949211 in words is "eighteen million, nine hundred forty-nine thousand, two hundred eleven".