13818447 has 12 divisors (see below), whose sum is σ = 20016360. Its totient is φ = 9186288.

The previous prime is 13818439. The next prime is 13818451. The reversal of 13818447 is 74481831.

It is not a de Polignac number, because 13818447 - 2³ = 13818439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13818457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1528 + ... + 5474.

It is an arithmetic number, because the mean of its divisors is an integer number (1668030).

Almost surely, 2^13818447 is an apocalyptic number.

13818447 is a deficient number, since it is larger than the sum of its proper divisors (6197913).

13818447 is a wasteful number, since it uses less digits than its factorization.

13818447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342 (or 4339 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 13818447 is about 3717.3171777506. The cubic root of 13818447 is about 239.9678602795.

The spelling of 13818447 in words is "thirteen million, eight hundred eighteen thousand, four hundred forty-seven".