19886979413 has 16 divisors (see below), whose sum is σ = 23944803840. Its totient is φ = 16134908400.

The previous prime is 19886979391. The next prime is 19886979421. The reversal of 19886979413 is 31497968891.

It is a cyclic number.

It is not a de Polignac number, because 19886979413 - 2¹⁴ = 19886963029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19886979413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19886979433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91898 + ... + 219588.

It is an arithmetic number, because the mean of its divisors is an integer number (1496550240).

Almost surely, 2^19886979413 is an apocalyptic number.

It is an amenable number.

19886979413 is a deficient number, since it is larger than the sum of its proper divisors (4057824427).

19886979413 is a wasteful number, since it uses less digits than its factorization.

19886979413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128888.

The product of its digits is 23514624, while the sum is 65.

The spelling of 19886979413 in words is "nineteen billion, eight hundred eighty-six million, nine hundred seventy-nine thousand, four hundred thirteen".