19685752107 has 24 divisors (see below), whose sum is σ = 30666387600. Its totient is φ = 11199859776.

The previous prime is 19685752087. The next prime is 19685752109. The reversal of 19685752107 is 70125758691.

It is not a de Polignac number, because 19685752107 - 2⁶ = 19685752043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19685752107.

It is not an unprimeable number, because it can be changed into a prime (19685752109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258732 + ... + 326057.

It is an arithmetic number, because the mean of its divisors is an integer number (1277766150).

Almost surely, 2^19685752107 is an apocalyptic number.

19685752107 is a deficient number, since it is larger than the sum of its proper divisors (10980635493).

19685752107 is a wasteful number, since it uses less digits than its factorization.

19685752107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585035 (or 585028 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 51.

The spelling of 19685752107 in words is "nineteen billion, six hundred eighty-five million, seven hundred fifty-two thousand, one hundred seven".