18949367 has 2 divisors, whose sum is σ = 18949368. Its totient is φ = 18949366.

The previous prime is 18949363. The next prime is 18949387. The reversal of 18949367 is 76394981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18949367 - 2² = 18949363 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18949361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474683 + 9474684.

It is an arithmetic number, because the mean of its divisors is an integer number (9474684).

Almost surely, 2^18949367 is an apocalyptic number.

18949367 is a deficient number, since it is larger than the sum of its proper divisors (1).

18949367 is an equidigital number, since it uses as much as digits as its factorization.

18949367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 18949367 is about 4353.0870655203. The cubic root of 18949367 is about 266.6029203530.

The spelling of 18949367 in words is "eighteen million, nine hundred forty-nine thousand, three hundred sixty-seven".