13017940 has 24 divisors (see below), whose sum is σ = 29441160. Its totient is φ = 4806528.

The previous prime is 13017929. The next prime is 13017947. The reversal of 13017940 is 4971031.

It can be written as a sum of positive squares in 4 ways, for example, as 725904 + 12292036 = 852^2 + 3506^2 .

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13017947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24775 + ... + 25294.

It is an arithmetic number, because the mean of its divisors is an integer number (1226715).

Almost surely, 2^13017940 is an apocalyptic number.

13017940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13017940 is an abundant number, since it is smaller than the sum of its proper divisors (16423220).

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

13017940 is a wasteful number, since it uses less digits than its factorization.

13017940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50091 (or 50089 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13017940 is about 3608.0382481343. The cubic root of 13017940 is about 235.2415804516.

Adding to 13017940 its reverse (4971031), we get a palindrome (17988971).

The spelling of 13017940 in words is "thirteen million, seventeen thousand, nine hundred forty".