13421949243613 has 4 divisors (see below), whose sum is σ = 13424030495100. Its totient is φ = 13419867992128.

The previous prime is 13421949243611. The next prime is 13421949243701. The reversal of 13421949243613 is 31634294912431.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12018300094564 + 1403649149049 = 3466742^2 + 1184757^2 .

It is a cyclic number.

It is not a de Polignac number, because 13421949243613 - 2¹ = 13421949243611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421949243611) 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, 1040616070 + ... + 1040628967.

It is an arithmetic number, because the mean of its divisors is an integer number (3356007623775).

Almost surely, 2^{13421949243613} is an apocalyptic number.

It is an amenable number.

13421949243613 is a deficient number, since it is larger than the sum of its proper divisors (2081251487).

13421949243613 is an equidigital number, since it uses as much as digits as its factorization.

13421949243613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081251486.

The product of its digits is 3359232, while the sum is 52.

The spelling of 13421949243613 in words is "thirteen trillion, four hundred twenty-one billion, nine hundred forty-nine million, two hundred forty-three thousand, six hundred thirteen".