19385642137 has 8 divisors (see below), whose sum is σ = 19840519296. Its totient is φ = 18932532432.

The previous prime is 19385642057. The next prime is 19385642153. The reversal of 19385642137 is 73124658391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19385642137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19385642537) 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 in 7 ways as a sum of consecutive naturals, for example, 419658 + ... + 463555.

It is an arithmetic number, because the mean of its divisors is an integer number (2480064912).

Almost surely, 2^19385642137 is an apocalyptic number.

It is an amenable number.

19385642137 is a deficient number, since it is larger than the sum of its proper divisors (454877159).

19385642137 is an equidigital number, since it uses as much as digits as its factorization.

19385642137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883727.

The product of its digits is 1088640, while the sum is 49.

The spelling of 19385642137 in words is "nineteen billion, three hundred eighty-five million, six hundred forty-two thousand, one hundred thirty-seven".