19868606947 has 8 divisors (see below), whose sum is σ = 22838234976. Its totient is φ = 16931792832.

The previous prime is 19868606941. The next prime is 19868606987. The reversal of 19868606947 is 74960686891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19868606947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19868606941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8202178 + ... + 8204599.

It is an arithmetic number, because the mean of its divisors is an integer number (2854779372).

Almost surely, 2^19868606947 is an apocalyptic number.

19868606947 is a deficient number, since it is larger than the sum of its proper divisors (2969628029).

19868606947 is a wasteful number, since it uses less digits than its factorization.

19868606947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16406957.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 19868606947 in words is "nineteen billion, eight hundred sixty-eight million, six hundred six thousand, nine hundred forty-seven".