13513421205 has 48 divisors (see below), whose sum is σ = 24694400640. Its totient is φ = 6817219200.

The previous prime is 13513421113. The next prime is 13513421209. The reversal of 13513421205 is 50212431531.

13513421205 is a `hidden beast` number, since 1 + 35 + 1 + 3 + 421 + 205 = 666.

It is not a de Polignac number, because 13513421205 - 2¹⁸ = 13513159061 is a prime.

It is a super-2 number, since 2×13513421205² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513421209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 553200 + ... + 577110.

It is an arithmetic number, because the mean of its divisors is an integer number (514466680).

Almost surely, 2^13513421205 is an apocalyptic number.

13513421205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13513421205 is a deficient number, since it is larger than the sum of its proper divisors (11180979435).

13513421205 is a wasteful number, since it uses less digits than its factorization.

13513421205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24602 (or 24599 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13513421205 its reverse (50212431531), we get a palindrome (63725852736).

The spelling of 13513421205 in words is "thirteen billion, five hundred thirteen million, four hundred twenty-one thousand, two hundred five".