13130423440 has 40 divisors (see below), whose sum is σ = 30761299008. Its totient is φ = 5212072320.

The previous prime is 13130423429. The next prime is 13130423441. The reversal of 13130423440 is 4432403131.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (13130423441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615972 + ... + 636931.

Almost surely, 2^13130423440 is an apocalyptic number.

13130423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13130423440 is an abundant number, since it is smaller than the sum of its proper divisors (17630875568).

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

13130423440 is a wasteful number, since it uses less digits than its factorization.

13130423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253047 (or 1253041 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 13130423440 its reverse (4432403131), we get a palindrome (17562826571).

The spelling of 13130423440 in words is "thirteen billion, one hundred thirty million, four hundred twenty-three thousand, four hundred forty".