13818387 has 8 divisors (see below), whose sum is σ = 20099520. Its totient is φ = 8374760.

The previous prime is 13818383. The next prime is 13818397. The reversal of 13818387 is 78381831.

13818387 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13818387 - 2² = 13818383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13818383) 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, 209337 + ... + 209402.

It is an arithmetic number, because the mean of its divisors is an integer number (2512440).

Almost surely, 2^13818387 is an apocalyptic number.

13818387 is a deficient number, since it is larger than the sum of its proper divisors (6281133).

13818387 is a wasteful number, since it uses less digits than its factorization.

13818387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418753.

The product of its digits is 32256, while the sum is 39.

The square root of 13818387 is about 3717.3091074055. The cubic root of 13818387 is about 239.9675129638.

The spelling of 13818387 in words is "thirteen million, eight hundred eighteen thousand, three hundred eighty-seven".