19887103745 has 8 divisors (see below), whose sum is σ = 24269008320. Its totient is φ = 15640027120.

The previous prime is 19887103741. The next prime is 19887103759. The reversal of 19887103745 is 54730178891.

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

It is not a de Polignac number, because 19887103745 - 2² = 19887103741 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19887103741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33706661 + ... + 33707250.

It is an arithmetic number, because the mean of its divisors is an integer number (3033626040).

Almost surely, 2^19887103745 is an apocalyptic number.

It is an amenable number.

19887103745 is a deficient number, since it is larger than the sum of its proper divisors (4381904575).

19887103745 is an equidigital number, since it uses as much as digits as its factorization.

19887103745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67413975.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 19887103745 in words is "nineteen billion, eight hundred eighty-seven million, one hundred three thousand, seven hundred forty-five".