13505948471 has 4 divisors (see below), whose sum is σ = 13533015000. Its totient is φ = 13478881944.

The previous prime is 13505948461. The next prime is 13505948509. The reversal of 13505948471 is 17484950531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17484950531 = 53 ⋅329904727.

It is a cyclic number.

It is not a de Polignac number, because 13505948471 - 2¹⁴ = 13505932087 is a prime.

It is a super-3 number, since 3×13505948471³ (a number of 31 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 (13505948431) 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, 13532516 + ... + 13533513.

It is an arithmetic number, because the mean of its divisors is an integer number (3383253750).

Almost surely, 2^13505948471 is an apocalyptic number.

13505948471 is a deficient number, since it is larger than the sum of its proper divisors (27066529).

13505948471 is an equidigital number, since it uses as much as digits as its factorization.

13505948471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27066528.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 13505948471 in words is "thirteen billion, five hundred five million, nine hundred forty-eight thousand, four hundred seventy-one".