13420251138 has 32 divisors (see below), whose sum is σ = 30852187776. Its totient is φ = 3812191488.

The previous prime is 13420251121. The next prime is 13420251139. The reversal of 13420251138 is 83115202431.

It is not an unprimeable number, because it can be changed into a prime (13420251139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916231 + ... + 930762.

It is an arithmetic number, because the mean of its divisors is an integer number (964130868).

Almost surely, 2^13420251138 is an apocalyptic number.

13420251138 is an abundant number, since it is smaller than the sum of its proper divisors (17431936638).

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

13420251138 is a wasteful number, since it uses less digits than its factorization.

13420251138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847178.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 13420251138 its reverse (83115202431), we get a palindrome (96535453569).

The spelling of 13420251138 in words is "thirteen billion, four hundred twenty million, two hundred fifty-one thousand, one hundred thirty-eight".