13505918 has 8 divisors (see below), whose sum is σ = 20283312. Its totient is φ = 6744816.

The previous prime is 13505911. The next prime is 13505923. The reversal of 13505918 is 81950531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13505911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730 + ... + 5477.

It is an arithmetic number, because the mean of its divisors is an integer number (2535414).

Almost surely, 2^13505918 is an apocalyptic number.

13505918 is a deficient number, since it is larger than the sum of its proper divisors (6777394).

13505918 is an equidigital number, since it uses as much as digits as its factorization.

13505918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 13505918 is about 3675.0398637294. The cubic root of 13505918 is about 238.1449461917.

The spelling of 13505918 in words is "thirteen million, five hundred five thousand, nine hundred eighteen".