19117387387 has 12 divisors (see below), whose sum is σ = 22543235976. Its totient is φ = 16161858720.

The previous prime is 19117387369. The next prime is 19117387423. The reversal of 19117387387 is 78378371191.

It is not a de Polignac number, because 19117387387 - 2⁷ = 19117387259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19117387307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2668689 + ... + 2675842.

It is an arithmetic number, because the mean of its divisors is an integer number (1878602998).

Almost surely, 2^19117387387 is an apocalyptic number.

19117387387 is a deficient number, since it is larger than the sum of its proper divisors (3425848589).

19117387387 is an equidigital number, since it uses as much as digits as its factorization.

19117387387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344618 (or 5344611 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 55.

The spelling of 19117387387 in words is "nineteen billion, one hundred seventeen million, three hundred eighty-seven thousand, three hundred eighty-seven".