19687056341 has 4 divisors (see below), whose sum is σ = 19688311884. Its totient is φ = 19685800800.

The previous prime is 19687056209. The next prime is 19687056343. The reversal of 19687056341 is 14365078691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10109498116 + 9577558225 = 100546^2 + 97865^2 .

It is a cyclic number.

It is not a de Polignac number, because 19687056341 - 2³⁴ = 2507187157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19687056341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19687056343) 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 3 ways as a sum of consecutive naturals, for example, 603950 + ... + 635711.

It is an arithmetic number, because the mean of its divisors is an integer number (4922077971).

Almost surely, 2^19687056341 is an apocalyptic number.

It is an amenable number.

19687056341 is a deficient number, since it is larger than the sum of its proper divisors (1255543).

19687056341 is a wasteful number, since it uses less digits than its factorization.

19687056341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255542.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 19687056341 in words is "nineteen billion, six hundred eighty-seven million, fifty-six thousand, three hundred forty-one".