13913218 has 16 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 6298000.

The previous prime is 13913213. The next prime is 13913219. The reversal of 13913218 is 81231931.

It is not an unprimeable number, because it can be changed into a prime (13913213) 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, 4743 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^13913218 is an apocalyptic number.

13913218 is a deficient number, since it is larger than the sum of its proper divisors (8948222).

13913218 is a wasteful number, since it uses less digits than its factorization.

13913218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633.

The product of its digits is 1296, while the sum is 28.

The square root of 13913218 is about 3730.0426271023. The cubic root of 13913218 is about 240.5152011115.

The spelling of 13913218 in words is "thirteen million, nine hundred thirteen thousand, two hundred eighteen".