19166340539 has 2 divisors, whose sum is σ = 19166340540. Its totient is φ = 19166340538.

The previous prime is 19166340527. The next prime is 19166340541. The reversal of 19166340539 is 93504366191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19166340539 - 2²⁸ = 18897905083 is a prime.

Together with 19166340541, 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 = 19166340493 and 19166340502.

It is not a weakly prime, because it can be changed into another prime (19166340139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9583170269 + 9583170270.

It is an arithmetic number, because the mean of its divisors is an integer number (9583170270).

Almost surely, 2^19166340539 is an apocalyptic number.

19166340539 is a deficient number, since it is larger than the sum of its proper divisors (1).

19166340539 is an equidigital number, since it uses as much as digits as its factorization.

19166340539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 19166340539 in words is "nineteen billion, one hundred sixty-six million, three hundred forty thousand, five hundred thirty-nine".