19794876865 has 8 divisors (see below), whose sum is σ = 24520105728. Its totient is φ = 15325065840.

The previous prime is 19794876851. The next prime is 19794876877. The reversal of 19794876865 is 56867849791.

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

It is not a de Polignac number, because 19794876865 - 2²⁵ = 19761322433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19794876794 and 19794876803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63854287 + ... + 63854596.

It is an arithmetic number, because the mean of its divisors is an integer number (3065013216).

Almost surely, 2^19794876865 is an apocalyptic number.

It is an amenable number.

19794876865 is a deficient number, since it is larger than the sum of its proper divisors (4725228863).

19794876865 is a wasteful number, since it uses less digits than its factorization.

19794876865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127708919.

The product of its digits is 182891520, while the sum is 70.

The spelling of 19794876865 in words is "nineteen billion, seven hundred ninety-four million, eight hundred seventy-six thousand, eight hundred sixty-five".