19436680913 has 8 divisors (see below), whose sum is σ = 20943574848. Its totient is φ = 17931467664.

The previous prime is 19436680903. The next prime is 19436680969. The reversal of 19436680913 is 31908663491.

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

It is a cyclic number.

It is not a de Polignac number, because 19436680913 - 2⁶ = 19436680849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19436680903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396095 + ... + 442452.

It is an arithmetic number, because the mean of its divisors is an integer number (2617946856).

Almost surely, 2^19436680913 is an apocalyptic number.

19436680913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19436680913 is a deficient number, since it is larger than the sum of its proper divisors (1506893935).

19436680913 is a wasteful number, since it uses less digits than its factorization.

19436680913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840343.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 19436680913 in words is "nineteen billion, four hundred thirty-six million, six hundred eighty thousand, nine hundred thirteen".