13719918 has 32 divisors (see below), whose sum is σ = 29998080. Its totient is φ = 4164480.

The previous prime is 13719913. The next prime is 13719947. The reversal of 13719918 is 81991731.

It is a super-2 number, since 2×13719918² = 376472299853448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13719913) 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 15 ways as a sum of consecutive naturals, for example, 993 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^13719918 is an apocalyptic number.

13719918 is an abundant number, since it is smaller than the sum of its proper divisors (16278162).

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

13719918 is a wasteful number, since it uses less digits than its factorization.

13719918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392.

The product of its digits is 13608, while the sum is 39.

The square root of 13719918 is about 3704.0407665143. The cubic root of 13719918 is about 239.3961556017.

The spelling of 13719918 in words is "thirteen million, seven hundred nineteen thousand, nine hundred eighteen".