19851078713 has 8 divisors (see below), whose sum is σ = 19973892960. Its totient is φ = 19728612000.

The previous prime is 19851078703. The next prime is 19851078727. The reversal of 19851078713 is 31787015891.

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

It is a cyclic number.

It is not a de Polignac number, because 19851078713 - 2⁴ = 19851078697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19851078703) 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, 28178 + ... + 201236.

It is an arithmetic number, because the mean of its divisors is an integer number (2496736620).

Almost surely, 2^19851078713 is an apocalyptic number.

It is an amenable number.

19851078713 is a deficient number, since it is larger than the sum of its proper divisors (122814247).

19851078713 is a wasteful number, since it uses less digits than its factorization.

19851078713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173767.

The product of its (nonzero) digits is 423360, while the sum is 50.

The spelling of 19851078713 in words is "nineteen billion, eight hundred fifty-one million, seventy-eight thousand, seven hundred thirteen".