13205424020 has 24 divisors (see below), whose sum is σ = 28625952768. Its totient is φ = 5111776800.

The previous prime is 13205423993. The next prime is 13205424041. The reversal of 13205424020 is 2042450231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10648916 + ... + 10650155.

It is an arithmetic number, because the mean of its divisors is an integer number (1192748032).

Almost surely, 2^13205424020 is an apocalyptic number.

13205424020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13205424020 is an abundant number, since it is smaller than the sum of its proper divisors (15420528748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13205424020 is a wasteful number, since it uses less digits than its factorization.

13205424020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21299111 (or 21299109 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 13205424020 its reverse (2042450231), we get a palindrome (15247874251).

The spelling of 13205424020 in words is "thirteen billion, two hundred five million, four hundred twenty-four thousand, twenty".