19827878973 has 16 divisors (see below), whose sum is σ = 30553395840. Its totient is φ = 11202909696.

The previous prime is 19827878951. The next prime is 19827878981. The reversal of 19827878973 is 37987872891.

It is not a de Polignac number, because 19827878973 - 2⁹ = 19827878461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19827878898 and 19827878907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19827870973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5302540 + ... + 5306277.

It is an arithmetic number, because the mean of its divisors is an integer number (1909587240).

Almost surely, 2^19827878973 is an apocalyptic number.

It is an amenable number.

19827878973 is a deficient number, since it is larger than the sum of its proper divisors (10725516867).

19827878973 is a wasteful number, since it uses less digits than its factorization.

19827878973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10608916.

The product of its digits is 85349376, while the sum is 69.

The spelling of 19827878973 in words is "nineteen billion, eight hundred twenty-seven million, eight hundred seventy-eight thousand, nine hundred seventy-three".