13520260381 has 4 divisors (see below), whose sum is σ = 13601220192. Its totient is φ = 13439300572.

The previous prime is 13520260363. The next prime is 13520260387. The reversal of 13520260381 is 18306202531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13520260381 - 2¹¹ = 13520258333 is a prime.

It is a super-2 number, since 2×13520260381² (a number of 21 digits) contains 22 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 (13520260387) 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, 40479655 + ... + 40479988.

It is an arithmetic number, because the mean of its divisors is an integer number (3400305048).

Almost surely, 2^13520260381 is an apocalyptic number.

It is an amenable number.

13520260381 is a deficient number, since it is larger than the sum of its proper divisors (80959811).

13520260381 is an equidigital number, since it uses as much as digits as its factorization.

13520260381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80959810.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 13520260381 in words is "thirteen billion, five hundred twenty million, two hundred sixty thousand, three hundred eighty-one".