19520568471 has 4 divisors (see below), whose sum is σ = 26027424632. Its totient is φ = 13013712312.

The previous prime is 19520568449. The next prime is 19520568481. The reversal of 19520568471 is 17486502591.

It is a happy number.

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

It is not a de Polignac number, because 19520568471 - 2⁶ = 19520568407 is a prime.

It is a super-3 number, since 3×19520568471³ (a number of 32 digits) contains 333 as substring.

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 19520568471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19520568481) 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, 3253428076 + ... + 3253428081.

It is an arithmetic number, because the mean of its divisors is an integer number (6506856158).

Almost surely, 2^19520568471 is an apocalyptic number.

19520568471 is a deficient number, since it is larger than the sum of its proper divisors (6506856161).

19520568471 is an equidigital number, since it uses as much as digits as its factorization.

19520568471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506856160.

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 19520568471 in words is "nineteen billion, five hundred twenty million, five hundred sixty-eight thousand, four hundred seventy-one".