13431018 has 16 divisors (see below), whose sum is σ = 26904960. Its totient is φ = 4469856.

The previous prime is 13431017. The next prime is 13431053. The reversal of 13431018 is 81013431.

It is a junction number, because it is equal to n+sod(n) for n = 13430985 and 13431003.

It is not an unprimeable number, because it can be changed into a prime (13431017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3471 + ... + 6237.

It is an arithmetic number, because the mean of its divisors is an integer number (1681560).

Almost surely, 2^13431018 is an apocalyptic number.

13431018 is an abundant number, since it is smaller than the sum of its proper divisors (13473942).

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

13431018 is a wasteful number, since it uses less digits than its factorization.

13431018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13431018 is about 3664.8353305435. The cubic root of 13431018 is about 237.7039017171.

Adding to 13431018 its reverse (81013431), we get a palindrome (94444449).

The spelling of 13431018 in words is "thirteen million, four hundred thirty-one thousand, eighteen".