19318241 has 2 divisors, whose sum is σ = 19318242. Its totient is φ = 19318240.

The previous prime is 19318207. The next prime is 19318259. The reversal of 19318241 is 14281391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12453841 + 6864400 = 3529^2 + 2620^2 .

It is an emirp because it is prime and its reverse (14281391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19318241 - 2²² = 15123937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19318261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9659120 + 9659121.

It is an arithmetic number, because the mean of its divisors is an integer number (9659121).

Almost surely, 2^19318241 is an apocalyptic number.

It is an amenable number.

19318241 is a deficient number, since it is larger than the sum of its proper divisors (1).

19318241 is an equidigital number, since it uses as much as digits as its factorization.

19318241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 19318241 is about 4395.2520974342. The cubic root of 19318241 is about 268.3217389724.

The spelling of 19318241 in words is "nineteen million, three hundred eighteen thousand, two hundred forty-one".