19705563213 has 16 divisors (see below), whose sum is σ = 30759904896. Its totient is φ = 10985679360.

The previous prime is 19705563203. The next prime is 19705563217. The reversal of 19705563213 is 31236550791.

It is not a de Polignac number, because 19705563213 - 2⁴ = 19705563197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19705563217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11442556 + ... + 11444277.

It is an arithmetic number, because the mean of its divisors is an integer number (1922494056).

Almost surely, 2^19705563213 is an apocalyptic number.

It is an amenable number.

19705563213 is a deficient number, since it is larger than the sum of its proper divisors (11054341683).

19705563213 is a wasteful number, since it uses less digits than its factorization.

19705563213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22886884.

The product of its (nonzero) digits is 170100, while the sum is 42.

The spelling of 19705563213 in words is "nineteen billion, seven hundred five million, five hundred sixty-three thousand, two hundred thirteen".