19647607085 has 16 divisors (see below), whose sum is σ = 24137927616. Its totient is φ = 15344598528.

The previous prime is 19647607043. The next prime is 19647607093. The reversal of 19647607085 is 58070674691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19647607085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411002 + ... + 456308.

It is an arithmetic number, because the mean of its divisors is an integer number (1508620476).

Almost surely, 2^19647607085 is an apocalyptic number.

It is an amenable number.

19647607085 is a deficient number, since it is larger than the sum of its proper divisors (4490320531).

19647607085 is a wasteful number, since it uses less digits than its factorization.

19647607085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47372.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 19647607085 in words is "nineteen billion, six hundred forty-seven million, six hundred seven thousand, eighty-five".