19411839947 has 4 divisors (see below), whose sum is σ = 19657559520. Its totient is φ = 19166120376.

The previous prime is 19411839919. The next prime is 19411840043. The reversal of 19411839947 is 74993811491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74993811491 = 98081 ⋅764611.

It is a cyclic number.

It is not a de Polignac number, because 19411839947 - 2¹⁰ = 19411838923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19411839892 and 19411839901.

It is not an unprimeable number, because it can be changed into a prime (19411839847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122859668 + ... + 122859825.

It is an arithmetic number, because the mean of its divisors is an integer number (4914389880).

Almost surely, 2^19411839947 is an apocalyptic number.

19411839947 is a deficient number, since it is larger than the sum of its proper divisors (245719573).

19411839947 is an equidigital number, since it uses as much as digits as its factorization.

19411839947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245719572.

The product of its digits is 1959552, while the sum is 56.

The spelling of 19411839947 in words is "nineteen billion, four hundred eleven million, eight hundred thirty-nine thousand, nine hundred forty-seven".