19877208759 has 12 divisors (see below), whose sum is σ = 29774913896. Its totient is φ = 13251472344.

The previous prime is 19877208733. The next prime is 19877208781. The reversal of 19877208759 is 95780277891.

It is a de Polignac number, because none of the positive numbers 2^k-19877208759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19877208696 and 19877208705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19877208059) 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, 40899364 + ... + 40899849.

Almost surely, 2^19877208759 is an apocalyptic number.

19877208759 is a deficient number, since it is larger than the sum of its proper divisors (9897705137).

19877208759 is an frugal number, since it uses more digits than its factorization.

19877208759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81799228 (or 81799216 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 63.

The spelling of 19877208759 in words is "nineteen billion, eight hundred seventy-seven million, two hundred eight thousand, seven hundred fifty-nine".