19747716747 has 32 divisors (see below), whose sum is σ = 30687083520. Its totient is φ = 11169148320.

The previous prime is 19747716733. The next prime is 19747716757. The reversal of 19747716747 is 74761774791.

It is not a de Polignac number, because 19747716747 - 2⁸ = 19747716491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19747716757) 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 31 ways as a sum of consecutive naturals, for example, 193033 + ... + 277050.

It is an arithmetic number, because the mean of its divisors is an integer number (958971360).

Almost surely, 2^19747716747 is an apocalyptic number.

19747716747 is a deficient number, since it is larger than the sum of its proper divisors (10939366773).

19747716747 is a wasteful number, since it uses less digits than its factorization.

19747716747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470183.

The product of its digits is 14521248, while the sum is 60.

The spelling of 19747716747 in words is "nineteen billion, seven hundred forty-seven million, seven hundred sixteen thousand, seven hundred forty-seven".