13520643043 has 4 divisors (see below), whose sum is σ = 13522230568. Its totient is φ = 13519055520.

The previous prime is 13520642981. The next prime is 13520643091. The reversal of 13520643043 is 34034602531.

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 13520643043 - 2¹³ = 13520634851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13520642996 and 13520643014.

It is not an unprimeable number, because it can be changed into a prime (13520623043) 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, 780918 + ... + 798043.

It is an arithmetic number, because the mean of its divisors is an integer number (3380557642).

Almost surely, 2^13520643043 is an apocalyptic number.

13520643043 is a deficient number, since it is larger than the sum of its proper divisors (1587525).

13520643043 is an equidigital number, since it uses as much as digits as its factorization.

13520643043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587524.

The product of its (nonzero) digits is 25920, while the sum is 31.

The spelling of 13520643043 in words is "thirteen billion, five hundred twenty million, six hundred forty-three thousand, forty-three".