19719734471 has 4 divisors (see below), whose sum is σ = 19789911744. Its totient is φ = 19649557200.

The previous prime is 19719734449. The next prime is 19719734473. The reversal of 19719734471 is 17443791791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19719734471 - 2²⁶ = 19652625607 is a prime.

It is a super-3 number, since 3×19719734471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19719734473) 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 3 ways as a sum of consecutive naturals, for example, 35088215 + ... + 35088776.

It is an arithmetic number, because the mean of its divisors is an integer number (4947477936).

Almost surely, 2^19719734471 is an apocalyptic number.

19719734471 is a deficient number, since it is larger than the sum of its proper divisors (70177273).

19719734471 is an equidigital number, since it uses as much as digits as its factorization.

19719734471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70177272.

The product of its digits is 1333584, while the sum is 53.

The spelling of 19719734471 in words is "nineteen billion, seven hundred nineteen million, seven hundred thirty-four thousand, four hundred seventy-one".