13402305520 has 20 divisors (see below), whose sum is σ = 31160360520. Its totient is φ = 5360922176.

The previous prime is 13402305503. The next prime is 13402305569. The reversal of 13402305520 is 2550320431.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83764330 + ... + 83764489.

It is an arithmetic number, because the mean of its divisors is an integer number (1558018026).

Almost surely, 2^13402305520 is an apocalyptic number.

13402305520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13402305520 is an abundant number, since it is smaller than the sum of its proper divisors (17758055000).

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

13402305520 is a wasteful number, since it uses less digits than its factorization.

13402305520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167528832 (or 167528826 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 13402305520 its reverse (2550320431), we get a palindrome (15952625951).

The spelling of 13402305520 in words is "thirteen billion, four hundred two million, three hundred five thousand, five hundred twenty".