13421334240 has 72 divisors (see below), whose sum is σ = 45800308008. Its totient is φ = 3579022080.

The previous prime is 13421334229. The next prime is 13421334293. The reversal of 13421334240 is 4243312431.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4658746 + ... + 4661625.

It is an arithmetic number, because the mean of its divisors is an integer number (636115389).

Almost surely, 2^13421334240 is an apocalyptic number.

13421334240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421334240 is an abundant number, since it is smaller than the sum of its proper divisors (32378973768).

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

13421334240 is a wasteful number, since it uses less digits than its factorization.

13421334240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9320392 (or 9320381 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 13421334240 its reverse (4243312431), we get a palindrome (17664646671).

The spelling of 13421334240 in words is "thirteen billion, four hundred twenty-one million, three hundred thirty-four thousand, two hundred forty".