19709712695 has 4 divisors (see below), whose sum is σ = 23651655240. Its totient is φ = 15767770152.

The previous prime is 19709712629. The next prime is 19709712697. The reversal of 19709712695 is 59621790791.

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

It is a cyclic number.

It is not a de Polignac number, because 19709712695 - 2⁸ = 19709712439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19709712695.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19709712697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970971265 + ... + 1970971274.

It is an arithmetic number, because the mean of its divisors is an integer number (5912913810).

Almost surely, 2^19709712695 is an apocalyptic number.

19709712695 is a deficient number, since it is larger than the sum of its proper divisors (3941942545).

19709712695 is an equidigital number, since it uses as much as digits as its factorization.

19709712695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941942544.

The product of its (nonzero) digits is 2143260, while the sum is 56.

The spelling of 19709712695 in words is "nineteen billion, seven hundred nine million, seven hundred twelve thousand, six hundred ninety-five".