13031418 has 32 divisors (see below), whose sum is σ = 27760320. Its totient is φ = 4064000.

The previous prime is 13031413. The next prime is 13031419. The reversal of 13031418 is 81413031.

It is a junction number, because it is equal to n+sod(n) for n = 13031394 and 13031403.

It is not an unprimeable number, because it can be changed into a prime (13031413) 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, 25348 + ... + 25856.

It is an arithmetic number, because the mean of its divisors is an integer number (867510).

Almost surely, 2^13031418 is an apocalyptic number.

13031418 is an abundant number, since it is smaller than the sum of its proper divisors (14728902).

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

13031418 is a wasteful number, since it uses less digits than its factorization.

13031418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782.

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

The square root of 13031418 is about 3609.9055389303. The cubic root of 13031418 is about 235.3227374917.

Adding to 13031418 its reverse (81413031), we get a palindrome (94444449).

The spelling of 13031418 in words is "thirteen million, thirty-one thousand, four hundred eighteen".