19863816413 has 16 divisors (see below), whose sum is σ = 24040779264. Its totient is φ = 16021996800.

The previous prime is 19863816383. The next prime is 19863816419. The reversal of 19863816413 is 31461836891.

It is not a de Polignac number, because 19863816413 - 2⁸ = 19863816157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19863816419) 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, 1127831 + ... + 1145307.

It is an arithmetic number, because the mean of its divisors is an integer number (1502548704).

Almost surely, 2^19863816413 is an apocalyptic number.

It is an amenable number.

19863816413 is a deficient number, since it is larger than the sum of its proper divisors (4176962851).

19863816413 is a wasteful number, since it uses less digits than its factorization.

19863816413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27052.

The product of its digits is 746496, while the sum is 50.

The spelling of 19863816413 in words is "nineteen billion, eight hundred sixty-three million, eight hundred sixteen thousand, four hundred thirteen".