18205000949 has 2 divisors, whose sum is σ = 18205000950. Its totient is φ = 18205000948.

The previous prime is 18205000927. The next prime is 18205000951. The reversal of 18205000949 is 94900050281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17048524900 + 1156476049 = 130570^2 + 34007^2 .

It is an emirp because it is prime and its reverse (94900050281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18205000949 is a prime.

Together with 18205000951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18205000909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9102500474 + 9102500475.

It is an arithmetic number, because the mean of its divisors is an integer number (9102500475).

Almost surely, 2^18205000949 is an apocalyptic number.

It is an amenable number.

18205000949 is a deficient number, since it is larger than the sum of its proper divisors (1).

18205000949 is an equidigital number, since it uses as much as digits as its factorization.

18205000949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 18205000949 in words is "eighteen billion, two hundred five million, nine hundred forty-nine", and thus it is an aban number.