19645700882305 has 12 divisors (see below), whose sum is σ = 25043170261500. Its totient is φ = 14792057133824.

The previous prime is 19645700882293. The next prime is 19645700882323. The reversal of 19645700882305 is 50328800754691.

19645700882305 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 502267029264 + 19143433853041 = 708708^2 + 4375321^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19645700882305 is a prime.

It is a super-2 number, since 2×19645700882305² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19645700882305.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6797818930 + ... + 6797821819.

It is an arithmetic number, because the mean of its divisors is an integer number (2086930855125).

It is a 1-persistent number, because it is pandigital, but 2⋅19645700882305 = 39291401764610 is not.

Almost surely, 2^{19645700882305} is an apocalyptic number.

It is an amenable number.

19645700882305 is a deficient number, since it is larger than the sum of its proper divisors (5397469379195).

19645700882305 is a wasteful number, since it uses less digits than its factorization.

19645700882305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13595640788 (or 13595640771 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 19645700882305 in words is "nineteen trillion, six hundred forty-five billion, seven hundred million, eight hundred eighty-two thousand, three hundred five".