19186897241 has 2 divisors, whose sum is σ = 19186897242. Its totient is φ = 19186897240.

The previous prime is 19186897207. The next prime is 19186897273. The reversal of 19186897241 is 14279868191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11978208025 + 7208689216 = 109445^2 + 84904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19186897241 is a prime.

It is not a weakly prime, because it can be changed into another prime (19186897201) 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, 9593448620 + 9593448621.

It is an arithmetic number, because the mean of its divisors is an integer number (9593448621).

Almost surely, 2^19186897241 is an apocalyptic number.

It is an amenable number.

19186897241 is a deficient number, since it is larger than the sum of its proper divisors (1).

19186897241 is an equidigital number, since it uses as much as digits as its factorization.

19186897241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 56.

The spelling of 19186897241 in words is "nineteen billion, one hundred eighty-six million, eight hundred ninety-seven thousand, two hundred forty-one".