13144851940 has 72 divisors (see below), whose sum is σ = 30795037056. Its totient is φ = 4708545600.

The previous prime is 13144851851. The next prime is 13144851943. The reversal of 13144851940 is 4915844131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13144851893 and 13144851902.

It is not an unprimeable number, because it can be changed into a prime (13144851943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121605 + ... + 202675.

It is an arithmetic number, because the mean of its divisors is an integer number (427708848).

Almost surely, 2^13144851940 is an apocalyptic number.

13144851940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13144851940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15397518528).

13144851940 is an abundant number, since it is smaller than the sum of its proper divisors (17650185116).

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

13144851940 is a wasteful number, since it uses less digits than its factorization.

13144851940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81169 (or 81156 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 13144851940 in words is "thirteen billion, one hundred forty-four million, eight hundred fifty-one thousand, nine hundred forty".