19509041 has 2 divisors, whose sum is σ = 19509042. Its totient is φ = 19509040.

The previous prime is 19509011. The next prime is 19509043. The reversal of 19509041 is 14090591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 8386816 = 3335^2 + 2896^2 .

It is an emirp because it is prime and its reverse (14090591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19509041 - 2¹⁰ = 19508017 is a prime.

Together with 19509043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19508995 and 19509013.

It is not a weakly prime, because it can be changed into another prime (19509043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9754520 + 9754521.

It is an arithmetic number, because the mean of its divisors is an integer number (9754521).

Almost surely, 2^19509041 is an apocalyptic number.

It is an amenable number.

19509041 is a deficient number, since it is larger than the sum of its proper divisors (1).

19509041 is an equidigital number, since it uses as much as digits as its factorization.

19509041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 19509041 is about 4416.9040062016. The cubic root of 19509041 is about 269.2022221475.

The spelling of 19509041 in words is "nineteen million, five hundred nine thousand, forty-one".