19868137327 has 2 divisors, whose sum is σ = 19868137328. Its totient is φ = 19868137326.

The previous prime is 19868137313. The next prime is 19868137343. The reversal of 19868137327 is 72373186891.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (72373186891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19868137327 - 2²³ = 19859748719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19868837327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9934068663 + 9934068664.

It is an arithmetic number, because the mean of its divisors is an integer number (9934068664).

Almost surely, 2^19868137327 is an apocalyptic number.

19868137327 is a deficient number, since it is larger than the sum of its proper divisors (1).

19868137327 is an equidigital number, since it uses as much as digits as its factorization.

19868137327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 55.

The spelling of 19868137327 in words is "nineteen billion, eight hundred sixty-eight million, one hundred thirty-seven thousand, three hundred twenty-seven".