19838868213 has 16 divisors (see below), whose sum is σ = 27276926976. Its totient is φ = 12818825520.

The previous prime is 19838868211. The next prime is 19838868227. The reversal of 19838868213 is 31286883891.

It is a happy number.

It is not a de Polignac number, because 19838868213 - 2¹ = 19838868211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19838868211) 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, 668493 + ... + 697538.

It is an arithmetic number, because the mean of its divisors is an integer number (1704807936).

Almost surely, 2^19838868213 is an apocalyptic number.

It is an amenable number.

19838868213 is a deficient number, since it is larger than the sum of its proper divisors (7438058763).

19838868213 is a wasteful number, since it uses less digits than its factorization.

19838868213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366184.

The product of its digits is 3981312, while the sum is 57.

The spelling of 19838868213 in words is "nineteen billion, eight hundred thirty-eight million, eight hundred sixty-eight thousand, two hundred thirteen".